Patents by Inventor Jonathan Agre

Jonathan Agre 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: 8688041
    Abstract: A mobile network solution provides secure and portable wireless networking service to mobile users with devices equipped with wireless network interfaces. The Secure Nomadic Wireless Network, or SNOWNET, follows a hierarchical approach. Special SNOWNET nodes are deployed in the area where networking service is needed and form a backbone network. At the same time, SNOWNET nodes provide local access service to regular mobile clients. SNOWNET provides security through authentication of the nodes and clients, as well as through encryption of the data.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: April 1, 2014
    Assignee: Fujitsu Limited
    Inventors: Lusheng Ji, Jonathan Agre, Arunesh Mishra, Sohil Thakkar
  • Patent number: 8570955
    Abstract: A method of mapping transmission stations in a wireless network by grouping the transmission stations such that each transmission station in the same group transmits a sounding signal in the same time symbol. A method of grouping transmission stations in a wireless network includes sorting the transmission stations in descending order according to a number of transmission links of each transmission station that are unmapped, evaluating each transmission station based on how many unmapped transmission links can be mapped if the evaluated transmission station is made to transmit a sounding signal, placing each transmission station into a group, based on the evaluation, until all of the transmission links are mapped or until the maximum number of sounding bands are used, and, if all of the transmission links are not mapped, repeating the sorting, evaluating, and placing for each time symbol until all of the transmission links are mapped.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: October 29, 2013
    Assignee: Fujitsu Limited
    Inventors: Dorin Viorel, Wei-Peng Chen, Jonathan Agre, Chenxi Zhu
  • Patent number: 8116256
    Abstract: The embodiments provide transmitting at same time first and relay second node preambles aligning data frames among the first node and the relay second node wirelessly communicating in a channel and transmitting by the first node one or more radio resource control parameters managing radio resources of the wireless communicating in the channel among the aligned first node and the relay second node. A relay resynchronization amble sequence managing synchronizing in the channel the first node frames with the relay second node frames is periodically transmitted to the relay second node.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: February 14, 2012
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen, Jonathan Agre
  • Patent number: 8054817
    Abstract: The embodiments generate a new type of amble sequence for a wireless communication network with mixed nodes, by generating a first amble sequence invisible to a first node based upon an existing amble sequence for the first node and generating a second amble sequence having a low to zero cross-correlation with the first amble sequence, based upon the first amble sequence. The first and second amble sequences can be broadcast in alternating communication link frames.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: November 8, 2011
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen, Jonathan Agre
  • Patent number: 8032146
    Abstract: The embodiments balance wireless communication bandwidth capacity in a channel one or more cascading wireless communication links in a wireless communication cell, and manage the wireless communication bandwidth capacity in the channel across two or more virtual cells within the wireless communication cell.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: October 4, 2011
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen, Jonathan Agre
  • 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: 20110099611
    Abstract: A mobile network solution provides secure and portable wireless networking service to mobile users with devices equipped with wireless network interfaces. The Secure Nomadic Wireless Network, or SNOWNET, follows a hierarchical approach. Special SNOWNET nodes are deployed in the area where networking service is needed and form a backbone network. At the same time, SNOWNET nodes provide local access service to regular mobile clients. SNOWNET provides security through authentication of the nodes and clients, as well as through encryption of the data.
    Type: Application
    Filed: December 22, 2010
    Publication date: April 28, 2011
    Applicant: Fujitsu Limited
    Inventors: Lusheng Ji, Jonathan Agre, Arunesh Mishra, Sohil Thakkar
  • 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: 7881667
    Abstract: A mobile network solution provides secure and portable wireless networking service to mobile users with devices equipped with wireless network interfaces. The Secure Nomadic Wireless Network, or SNOWNET, follows a hierarchical approach. Special SNOWNET nodes are deployed in the area where networking service is needed and form a backbone network. At the same time, SNOWNET nodes provide local access service to regular mobile clients. SNOWNET provides security through authentication of the nodes and clients, as well as through encryption of the data.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: February 1, 2011
    Assignee: Fujitsu Limited
    Inventors: Lusheng Ji, Jonathan Agre, Arunesh Mishra, Sohil Thakkar
  • 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
  • Patent number: 7751829
    Abstract: A system and method uses wireless communication devices as beacons to determine the relative location of another target wireless communication device. The beacons transmit identifying information that the target device can use to determine the identity of the beacon. The target device can measure the received intensity of the beacon transmissions and determine an associated beacon that best satisfies a specified criteria (e.g., largest signal strength) using a procedure of the present invention that discriminates between multiple beacons.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: July 6, 2010
    Assignee: Fujitsu Limited
    Inventors: Ryusuke Masuoka, Sasikanth Avancha, Sohil Thakkar, Jonathan Agre
  • 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
  • Patent number: 7634230
    Abstract: A mobile network solution provides secure and portable wireless networking service to mobile users with devices equipped with wireless network interfaces. The Secure Nomadic Wireless Network, or SNOWNET, follows a hierarchical approach. Special SNOWNET nodes are deployed in the area where networking service is needed and form a backbone network. At the same time, SNOWNET nodes provide local access service to regular mobile clients. SNOWNET provides security through authentication of the nodes and clients, as well as through encryption of the data.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: December 15, 2009
    Assignee: Fujitsu Limited
    Inventors: Lusheng Ji, Jonathan Agre, Arunesh Mishra, Sohil Thakkar
  • Patent number: 7630343
    Abstract: Disclosed is a wireless station having a receiver and a network allocation vector associated with each of a plurality of directional antennas. The receivers concurrently listen for frames from remote stations. When any receiver detects a frame from a remote station, the receiver activates its associated NAV. The station has one or more transmitters that can transmit using the antennas. While transmitting a signal using an antenna, the receivers associated with any non-transmitting antennas continue to listen for signals from remote stations. The station cancels any signals from the transmitting antenna received by the non-transmitting antennas. To perform the cancellation, the station performs a self-calibration procedure. The station can self-calibrate by either silencing neighboring stations or by inserting null tones into a transmitted calibration signal.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: December 8, 2009
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Tamer Nadeem, Jonathan Agre
  • Publication number: 20090103488
    Abstract: A data communication resource allocation for OFDMA based wireless systems supporting heterogeneous traffic is provided by allocating the rates to users subject to power/bandwidth constraints, according to a user selection metric and rate allocation based on traffic requirements and channel conditions. Thus, a proportionally fair rate allocation with minimum rate constraint to data sessions and short term rate guarantees to real-time sessions can be provided.
    Type: Application
    Filed: June 30, 2008
    Publication date: April 23, 2009
    Applicants: University Of Maryland, Fujitsu Limited
    Inventors: Chenxi ZHU, Tolga Girici, Jonathan Agre, Anthony Ephremides
  • Publication number: 20080232338
    Abstract: A mobile network solution provides secure and portable wireless networking service to mobile users with devices equipped with wireless network interfaces. The Secure Nomadic Wireless Network, or SNOWNET, follows a hierarchical approach. Special SNOWNET nodes are deployed in the area where networking service is needed and form a backbone network. At the same time, SNOWNET nodes provide local access service to regular mobile clients. SNOWNET provides security through authentication of the nodes and clients, as well as through encryption of the data.
    Type: Application
    Filed: March 21, 2008
    Publication date: September 25, 2008
    Applicant: FUJITSU LIMITED
    Inventors: Lusheng Ji, Jonathan Agre, Arunesh Mishra, Sohil Thakkar
  • Publication number: 20080219365
    Abstract: A method of mapping transmission stations in a wireless network by grouping the transmission stations such that each transmission station in the same group transmits a sounding signal in the same time symbol. A method of grouping transmission stations in a wireless network includes sorting the transmission stations in descending order according to a number of transmission links of each transmission station that are unmapped, evaluating each transmission station based on how many unmapped transmission links can be mapped if the evaluated transmission station is made to transmit a sounding signal, placing each transmission station into a group, based on the evaluation, until all of the transmission links are mapped or until the maximum number of sounding bands are used, and, if all of the transmission links are not mapped, repeating the sorting, evaluating, and placing for each time symbol until all of the transmission links are mapped.
    Type: Application
    Filed: February 25, 2008
    Publication date: September 11, 2008
    Applicant: FUJITSU LIMITED
    Inventors: Dorin VIOREL, Wei-Peng Chen, Jonathan Agre, Chenxi Zhu
  • Publication number: 20080186899
    Abstract: The embodiments generate a new type of amble sequence for a wireless communication network with mixed nodes, by generating a first amble sequence invisible to a first node based upon an existing amble sequence for the first node and generating a second amble sequence having a low to zero cross-correlation with the first amble sequence, based upon the first amble sequence. The first and second amble sequences can be broadcast in alternating communication link frames.
    Type: Application
    Filed: July 31, 2007
    Publication date: August 7, 2008
    Applicant: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen, Jonathan Agre
  • Publication number: 20080188231
    Abstract: The embodiments balance wireless communication bandwidth capacity in a channel one or more cascading wireless communication links in a wireless communication cell, and manage the wireless communication bandwidth capacity in the channel across two or more virtual cells within the wireless communication cell.
    Type: Application
    Filed: July 31, 2007
    Publication date: August 7, 2008
    Applicant: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen, Jonathan Agre