Patents by Inventor Sri Hari Narlanka
Sri Hari Narlanka 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).
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Patent number: 8879573Abstract: A new media access control (MAC) protocol for cognitive wireless networks is described. The new MAC protocol allows each of multiple nodes, such as cell phones and computers with wireless, to determine utilization of a communication spectrum, such as the television broadcast band. The nodes collaborate to achieve a combined view of spectrum utilization in their local vicinity, in which scheduled users and empty time segments are mapped across a wide range of frequencies. Nodes negotiate with each other to reserve idle segments of the spectrum for packet exchange on negotiated frequencies. Control packet structure allows nodes to become prescient of the local spectrum utilization during handshaking. A cognitive device operating under the new MAC has a first radio that both scans the spectrum and monitors a control channel; and a second reconfigurable radio with adjustable parameters, including frequency and bandwidth, for packet transmission.Type: GrantFiled: August 29, 2007Date of Patent: November 4, 2014Assignee: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan
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Publication number: 20130301622Abstract: Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces.Type: ApplicationFiled: July 16, 2013Publication date: November 14, 2013Inventors: Paramvir Bahl, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan, Ranveer Chandra
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Patent number: 8488633Abstract: Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces.Type: GrantFiled: October 18, 2010Date of Patent: July 16, 2013Assignee: Microsoft CorporationInventors: Paramvir Bahl, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan, Ranveer Chandra
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Patent number: 8243612Abstract: Techniques for enhancing throughput capacity and/or bandwidth distribution fairness among APs in a wireless network are described. Specifically, a channel frequency profile which includes a center frequency and channel-width (i.e., channel bandwidth) is dynamically assigned to each of one or more APs in a wireless network. The assigned channel frequency profile for each AP is based, at least in part, on the current composition of the wireless network including, its topology and traffic load distribution. In this regard, each AP's channel frequency profile can be continuously or periodically changed such that the entire available frequency spectrum is effectively utilized and/or interference between APs is avoided or limited. This, in turn, enhances the throughput capacity and/or bandwidth distribution fairness of the wireless network.Type: GrantFiled: August 1, 2007Date of Patent: August 14, 2012Assignee: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Sri Hari Narlanka, Yunnan Wu, Yuan Yuan
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Publication number: 20110032892Abstract: Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces.Type: ApplicationFiled: October 18, 2010Publication date: February 10, 2011Applicant: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan
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Patent number: 7876786Abstract: Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces.Type: GrantFiled: April 2, 2008Date of Patent: January 25, 2011Assignee: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan
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Publication number: 20090196180Abstract: Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces.Type: ApplicationFiled: April 2, 2008Publication date: August 6, 2009Applicant: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan
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Publication number: 20090034457Abstract: Techniques for enhancing throughput capacity and/or bandwidth distribution fairness among APs in a wireless network are described. Specifically, a channel frequency profile which includes a center frequency and channel-width (i.e., channel bandwidth) is dynamically assigned to each of one or more APs in a wireless network. The assigned channel frequency profile for each AP is based, at least in part, on the current composition of the wireless network including, its topology and traffic load distribution. In this regard, each AP's channel frequency profile can be continuously or periodically changed such that the entire available frequency spectrum is effectively utilized and/or interference between APs is avoided or limited. This, in turn, enhances the throughput capacity and/or bandwidth distribution fairness of the wireless network.Type: ApplicationFiled: August 1, 2007Publication date: February 5, 2009Applicant: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan
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Publication number: 20080130519Abstract: A new media access control (MAC) protocol for cognitive wireless networks is described. The new MAC protocol allows each of multiple nodes, such as cell phones and computers with wireless, to determine utilization of a communication spectrum, such as the television broadcast band. The nodes collaborate to achieve a combined view of spectrum utilization in their local vicinity, in which scheduled users and empty time segments are mapped across a wide range of frequencies. Nodes negotiate with each other to reserve idle segments of the spectrum for packet exchange on negotiated frequencies. Control packet structure allows nodes to become prescient of the local spectrum utilization during handshaking. A cognitive device operating under the new MAC has a first radio that both scans the spectrum and monitors a control channel; and a second reconfigurable radio with adjustable parameters, including frequency and bandwidth, for packet transmission.Type: ApplicationFiled: August 29, 2007Publication date: June 5, 2008Applicant: Microsoft CorporationInventors: Paramvir Bahl, Ranveer Chandra, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan