Patents by Inventor Amir H. Kamalizad

Amir H. Kamalizad 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: 11218923
    Abstract: Embodiments for selective optimized roaming include receiving an indication that a connected device is at a cell edge of a first network. When an alternate access point cannot provide an alternate connection for the connected device, connections to other networks are assessed. This assessment includes receiving radio frequency (RF) signals for a second network and determining, from received RF signals, that the second network provides a better network connection. When the second network can provide a better network connection the connection to the first network is terminated.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: January 4, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Vishal S. Desai, Jerome Henry, Amir H. Kamalizad
  • Patent number: 10944603
    Abstract: Modulated radio frequency (RF) packets are received from a wireless device, and converted to modulated baseband packets. Baseband parameters are derived from the modulated baseband packets. A baseband profile including the baseband parameters is created for the wireless device. A database including baseband profiles of wireless devices is accessed. The baseband profiles are classified under known device types based on baseband parameters included in the baseband profiles. The baseband parameters of the baseband profile are compared to corresponding baseband parameters of the baseband profiles in the database. If the comparing indicates a match between the baseband profile and one of the baseband profiles, the wireless device is classified under the known device type of the one of the baseband profiles, and the baseband profile is stored in the database under the known device type.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: March 9, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Matthew A. Silverman, Amir H. Kamalizad, Jie C. Jiang
  • Publication number: 20200092765
    Abstract: Embodiments for selective optimized roaming include receiving an indication that a connected device is at a cell edge of a first network. When an alternate access point cannot provide an alternate connection for the connected device, connections to other networks are assessed. This assessment includes receiving radio frequency (RF) signals for a second network and determining, from received RF signals, that the second network provides a better network connection. When the second network can provide a better network connection the connection to the first network is terminated.
    Type: Application
    Filed: October 21, 2019
    Publication date: March 19, 2020
    Inventors: Vishal S. DESAI, Jerome HENRY, Amir H. KAMALIZAD
  • Publication number: 20190356520
    Abstract: Modulated radio frequency (RF) packets are received from a wireless device, and converted to modulated baseband packets. Baseband parameters are derived from the modulated baseband packets. A baseband profile including the baseband parameters is created for the wireless device. A database including baseband profiles of wireless devices is accessed. The baseband profiles are classified under known device types based on baseband parameters included in the baseband profiles. The baseband parameters of the baseband profile are compared to corresponding baseband parameters of the baseband profiles in the database. If the comparing indicates a match between the baseband profile and one of the baseband profiles, the wireless device is classified under the known device type of the one of the baseband profiles, and the baseband profile is stored in the database under the known device type.
    Type: Application
    Filed: May 17, 2018
    Publication date: November 21, 2019
    Inventors: Matthew A. Silverman, Amir H. Kamalizad, Jie C. Jiang
  • Patent number: 10455462
    Abstract: Embodiments for selective optimized roaming include receiving an indication that a connected device is at a cell edge of a first network. When an alternate access point cannot provide an alternate connection for the connected device, connections to other networks are assessed. This assessment includes receiving radio frequency (RF) signals for a second network and determining, from received RF signals, that the second network provides a better network connection. When the second network can provide a better network connection the connection to the first network is terminated.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: October 22, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Vishal S. Desai, Jerome Henry, Amir H. Kamalizad
  • Patent number: 10362489
    Abstract: Techniques for channelization of a wireless communication network in the presence of interference are described. In one embodiment, a method includes detecting an unlicensed wireless wide area network signal. The method includes selecting a wireless channel for a wireless local area network that includes frequencies associated with the unlicensed signal. The method includes allocating a first portion of the wireless channel that includes frequencies associated with the unlicensed signal to a first plurality of resource units and allocating a second portion of the wireless channel that excludes frequencies associated with the unlicensed signal to a second plurality of resource units. The method includes assigning the first plurality of resource units to a first group of client devices, and assigning the second plurality of resource units to a second group of client devices.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: July 23, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Vishal S. Desai, Amir H. Kamalizad, Matthew A. Silverman
  • Patent number: 9485130
    Abstract: A universal OFDM synchronizer for power line communication is provided. The universal OFDM synchronizer can be used for all known OFDM standards and allows maximum flexibility with best performance. The OFDM synchronizer comprises of a preamble averaging, a correlator and a peak discriminator. The OFDM synchronizer can be used with signals having 256 sample size preamble or 512 sample size preamble.
    Type: Grant
    Filed: October 20, 2013
    Date of Patent: November 1, 2016
    Assignee: Semitech Semiconductor Pty. Ltd.
    Inventors: Amir H. Kamalizad, Cameron Watt
  • Patent number: 9479379
    Abstract: The present invention provides a narrowband OFDM (NOFDM) system with frequency diversity redundant transmission and receiver diversity selection and combining scheme. The communication channel is segmented into independent plurality of sub-channels. The sub-channels can be used in an aggregated mode to transmit different data on every sub-channel or in a number of redundant modes, where the same data is sent on multiple sub-channels to achieve maximum robustness of communication. Redundant modes may include channel selection diversity and/or weighted channel combining diversity.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: October 25, 2016
    Assignee: Semitech Semiconductor Pty Ltd.
    Inventors: Amir H. Kamalizad, Zeev Collin
  • Publication number: 20150162970
    Abstract: The present invention provides a narrowband OFDM (NOFDM) system with frequency diversity redundant transmission and receiver diversity selection and combining scheme. The communication channel is segmented into independent plurality of sub-channels. The sub-channels can be used in an aggregated mode to transmit different data on every sub-channel or in a number of redundant modes, where the same data is sent on multiple sub-channels to achieve maximum robustness of communication. Redundant modes may include channel selection diversity and/or weighted channel combining diversity.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 11, 2015
    Inventors: Amir H. Kamalizad, Zeev Collin
  • Publication number: 20140112398
    Abstract: A universal OFDM synchronizer for power line communication is provided. The universal OFDM synchronizer can be used for all known OFDM standards and allows maximum flexibility with best performance. The OFDM synchronizer comprises of a preamble averaging, a correlator and a peak discriminator. The OFDM synchronizer can be used with signals having 256 sample size preamble or 512 sample size preamble.
    Type: Application
    Filed: October 20, 2013
    Publication date: April 24, 2014
    Applicant: Semitech Semiconductor Pty Ltd
    Inventors: Amir H. Kamalizad, Cameron Watt