Patents by Inventor Christian Huitema

Christian Huitema 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: 10602557
    Abstract: Methods and apparatus are disclosed for device discovery, pairing, and transmission of audio and video media, using two or more communication paths between a media sender/source node and a media receiver/sink node. In one example of the disclosed technology, a method performed with a sink node adapted to receive data via a peer-to-peer communication and a different, second communication path, includes selecting at least a portion of a second communication path to the sink node, determining whether the second communication path is secure, and, if the second communication path is determined to be secure, then accepting connections via the second communication path.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: March 24, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Drew Baron, Vishal Mhatre, Gianluigi Nusca, Christian Huitema
  • Patent number: 10581655
    Abstract: A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: March 3, 2020
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 10298504
    Abstract: The technologies disclosed herein provide improvements to the Low Extra Delay Background Transport (LEDBAT) protocol. Some aspects of the present disclosure introduce an adaptive congestion window gain for background connections. In some configurations, a gain value for influencing the transmission rate of a background connection is dynamically adjusted based on data indicating a round trip time (RTT). The RTT includes a sum of a time in which the data is communicated to a remote device and a time in which acknowledgement is data returned from the remote device. In some configurations, the gain is decreased when the RTT is below a threshold and the gain is increased when the RTT is above the threshold. Among other features, the present disclosure also provides techniques involving a modified slow-start, multiplicative decrease and periodic slowdowns. The features disclosed herein mitigate some existing issues, such as latency drift, inter-LEDBAT fairness, and unnecessary slowdowns.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: May 21, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Osman N. Ertugay, Christian Huitema, Praveen Balasubramanian, Daniel Havey
  • Patent number: 10255621
    Abstract: A computing environment containing a mesh network that is adapted to provide a reliable transport mechanism over which services may be delivered. Nodes of the mesh can automatically select routable addresses without conflicts, which allows nodes of the mesh to be accessed, even as the mesh changes through the addition or deletion of nodes. Also, nodes communicate with a protocol that supports service advertisements. These advertisements can identify mesh nodes that supply services, such as file or print servers, for which devices that have not yet connected to the network may be searching. Advertisements can also identify services to be used by nodes in the network, allowing, for example, a node to select a gateway providing a reliable connection to an external network. The mesh network can be used as a transport for communication using protocols, such as TCP/IP, that generally exhibit poor performance when using unreliable transports.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: April 9, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Thomas W. Kuehnel, Alok Manchanda, Taroon Mandhana, Amer A. Hassan, Mukesh Karki, Christian Huitema, Yusuf Atas
  • Publication number: 20190090179
    Abstract: A computing environment containing a mesh network that is adapted to provide a reliable transport mechanism over which services may be delivered. Nodes of the mesh can automatically select routable addresses without conflicts, which allows nodes of the mesh to be accessed, even as the mesh changes through the addition or deletion of nodes. Also, nodes communicate with a protocol that supports service advertisements. These advertisements can identify mesh nodes that supply services, such as file or print servers, for which devices that have not yet connected to the network may be searching. Advertisements can also identify services to be used by nodes in the network, allowing, for example, a node to select a gateway providing a reliable connection to an external network. The mesh network can be used as a transport for communication using protocols, such as TCP/IP, that generally exhibit poor performance when using unreliable transports.
    Type: Application
    Filed: October 2, 2018
    Publication date: March 21, 2019
    Inventors: Thomas W. KUEHNEL, Alok MANCHANDA, Taroon MANDHANA, Amer A. HASSAN, Mukesh KARKI, Christian HUITEMA, Yusuf ATAS
  • Patent number: 10182367
    Abstract: A system for signaling an application when a requested data rate and Quality of Service cannot be achieved using OFDM wireless data transmission, and the application proceeds by either renegotiating QoS and data rate, or waiting until they requested rate and QoS are met.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: January 15, 2019
    Assignee: Microsoft Technology Licensing LLC
    Inventors: Amer A. Hassan, Thomas W. Kuehnel, Deyun Wu, Christian Huitema, D. Gabriel Frost
  • Patent number: 10177953
    Abstract: Methods and apparatuses for Orthogonal Frequency-Division Multiplexing (OFDM) communication of non-OFDM radio signals are disclosed. The non-OFDM radio signals are force-modulated into OFDM signals. In one example, a non-OFDM signal is received and is processed into an OFDM signal to produce a created OFDM signal. An actual OFDM signal is also received and is processed together with the created OFDM signal.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: January 8, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 10142409
    Abstract: A method is provided for a host node in a computer network to determine its coordinates in a d-dimensional network space, comprising discovering an address of a peer node in the network, measuring network latency between the host node and the peer node, determining whether network latency has been measured for at least d+1 peer nodes, where, if network latency has not been measured for at least d+1 peer nodes, estimating the network coordinates of the host node, and where, if network latency has been measured for at least d+1 peer nodes, calculating the network coordinates of the host node using d+1 measured latencies.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: November 27, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: John L. Miller, Manuel Costa, Noah Horton, Christian Huitema, Sandeep K. Singhal
  • Patent number: 10123262
    Abstract: A computing environment containing a mesh network that is adapted to provide a reliable transport mechanism over which services may be delivered. Nodes of the mesh can automatically select routable addresses without conflicts, which allows nodes of the mesh to be accessed, even as the mesh changes through the addition or deletion of nodes. Also, nodes communicate with a protocol that supports service advertisements. These advertisements can identify mesh nodes that supply services, such as file or print servers, for which devices that have not yet connected to the network may be searching Advertisements can also identify services to be used by nodes in the network, allowing, for example, a node to select a gateway providing a reliable connection to an external network. The mesh network can be used as a transport for communication using protocols, such as TCP/IP, that generally exhibit poor performance when using unreliable transports.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: November 6, 2018
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Thomas W. Kuehnel, Alok Manchanda, Taroon Mandhana, Amer A. Hassan, Mukesh Karki, Christian Huitema, Yusuf Atas
  • Publication number: 20180152976
    Abstract: Methods and apparatus are disclosed for device discovery, pairing, and transmission of audio and video media, using two or more communication paths between a media sender/source node and a media receiver/sink node. In one example of the disclosed technology, a method performed with a sink node adapted to receive data via a peer-to-peer communication and a different, second communication path, includes selecting at least a portion of a second communication path to the sink node, determining whether the second communication path is secure, and, if the second communication path is determined to be secure, then accepting connections via the second communication path.
    Type: Application
    Filed: February 7, 2017
    Publication date: May 31, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Drew Baron, Vishal Mhatre, Gianluigi Nusca, Christian Huitema
  • Patent number: 9866418
    Abstract: A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: January 9, 2018
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amer A. Hassan, Christian Huitema
  • Publication number: 20170373897
    Abstract: Methods and apparatuses for Orthogonal Frequency-Division Multiplexing (OFDM) communication of non-OFDM radio signals are disclosed. The non-OFDM radio signals are force-modulated into OFDM signals. In one example, a non-OFDM signal is received and is processed into an OFDM signal to produce a created OFDM signal. An actual OFDM signal is also received and is processed together with the created OFDM signal.
    Type: Application
    Filed: August 22, 2017
    Publication date: December 28, 2017
    Inventors: Amer A. Hassan, Christian Huitema
  • Publication number: 20170324668
    Abstract: The technologies disclosed herein provide improvements to the Low Extra Delay Background Transport (LEDBAT) protocol. Some aspects of the present disclosure introduce an adaptive congestion window gain for background connections. In some configurations, a gain value for influencing the transmission rate of a background connection is dynamically adjusted based on data indicating a round trip time (RTT). The RTT includes a sum of a time in which the data is communicated to a remote device and a time in which acknowledgement is data returned from the remote device. In some configurations, the gain is decreased when the RTT is below a threshold and the gain is increased when the RTT is above the threshold. Among other features, the present disclosure also provides techniques involving a modified slow-start, multiplicative decrease and periodic slowdowns. The features disclosed herein mitigate some existing issues, such as latency drift, inter-LEDBAT fairness, and unnecessary slowdowns.
    Type: Application
    Filed: September 27, 2016
    Publication date: November 9, 2017
    Inventors: Osman N. Ertugay, Christian Huitema, Praveen Balasubramanian, Daniel Havey
  • Publication number: 20170324641
    Abstract: A system communicates packets of data between two computers starting at an initial rate. The system then enters a slow start mode and increases the rate. As the rate increases, the system monitors acknowledgement data indicating a round trip time (RTT) associated with individual packets. When the RTT meets or exceeds a threshold, the system exits the slow start mode and continues the background connection a selected rate. The selected rate is based on the acknowledgement data associated with one or more packets having an RTT that meet or exceed the threshold. The features disclosed herein mitigate some of the issues with the LEDBAT protocol and other congestion control techniques, some which may include queue overflows and unnecessary slowdowns.
    Type: Application
    Filed: October 21, 2016
    Publication date: November 9, 2017
    Inventors: Osman N. Ertugay, Christian Huitema, Praveen Balasubramanian, Daniel Havey
  • Publication number: 20170324642
    Abstract: The technologies disclosed herein provide improvements to the Low Extra Delay Background Transport (LEDBAT) protocol. In some scenarios, a LEDBAT connection cannot obtain accurate measurements for the base delay that it relies on. Slowing down a connection, initially and periodically, can ensure that base delay measurements begin accurately and remain accurate throughout the life of a connection. Data is communicated between two computers in a slow start mode, where a rate of the communication is increased over time from an initial rate. When one or more conditions are met, e.g., an interval lapses, the communication is slowed for a predetermined time period. The communication of the data then resumes in a slow start mode, where a rate of the communication is increased over time from an initial rate.
    Type: Application
    Filed: October 21, 2016
    Publication date: November 9, 2017
    Inventors: Osman N. Ertugay, Christian Huitema, Praveen Balasubramanian, Daniel Havey
  • Patent number: 9780810
    Abstract: A computing device with a configurable antenna. The antenna is configured through a switching circuit operating under software control. Operating characteristics of the antenna are configured based on connections between conducting segments established by the switching circuit, allowing the nominal frequency, bandwidth or other characteristics of the antenna to be configured. Because the switching is software controlled, the configurable antenna may be integrated with a software defined radio. The radio and antenna can be reconfigured to support communication according to different wireless technologies at different times or to interleave packets according to different wireless technologies to support concurrent sessions using different wireless technologies.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: October 3, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 9774415
    Abstract: A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: September 26, 2017
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 9755879
    Abstract: Methods and apparatuses for Orthogonal Frequency-Division Multiplexing (OFDM) communication of non-OFDM radio signals are disclosed. The non-OFDM radio signals are force-modulated into OFDM signals. In one example, a non-OFDM signal is received and is processed into an OFDM signal to produce a created OFDM signal. An actual OFDM signal is also received and is processed together with the created OFDM signal.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: September 5, 2017
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 9742529
    Abstract: A communication system in which an access point and one or more devices communicating through the access point adaptively apply Orthogonal Frequency Division Multiple Access (OFDMA). The access point may assign orthogonal subcarriers to devices as in conventional OFDMA, but the access point senses activity on the subcarriers and selects subcarriers without activity for assignment. In an alternative approach, a device that is configured for OFDMA communication may receive a channel assignment from a device that does not support OFDMA. The OFDMA-capable device may use only a portion of the subcarriers in the assigned channel, which may be communicated to the non-OFDMA device. During the non-OFDMA device may then ignore unused subcarriers in error detection and correction to avoid incorrectly classifying communications as erroneous.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: August 22, 2017
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amer A. Hassan, Adam Sapek, Hui Shen, Thomas W. Kuehnel, Deyun Wu, Christian Huitema
  • Publication number: 20170134196
    Abstract: A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.
    Type: Application
    Filed: January 20, 2017
    Publication date: May 11, 2017
    Inventors: Amer A. Hassan, Christian Huitema