Patents by Inventor Neal Castagnoli
Neal Castagnoli 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: 9955432Abstract: The present disclosure discloses a method and system for adaptive cell size management. The system can determine a minimum SNR value and one or more current environmental factors for a particular environment. Also, the system dynamically determines a minimum signal strength value for receiving wireless signals based on the minimum SNR value and the one or more current environmental factors, and configures a network device to receive signals with the minimum signal strength value. Alternatively, the system can estimate a particular coverage area such that a first set of wireless signals transmitted by devices located within the particular coverage area reach a network device at a minimum signal strength. The system then computes a transmission power such that a second set of wireless signals transmitted by the network device at the transmission power reaches an edge of the particular coverage area at a particular signal strength value.Type: GrantFiled: July 29, 2014Date of Patent: April 24, 2018Assignee: ARUBA NETWORKS, INC.Inventors: Subburajan Ponnuswamy, Neal Castagnoli
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Patent number: 9596567Abstract: Various techniques and systems are provided for determining a location of a target wireless device. Specifically, various techniques and systems are provided for determining a location of a wireless device using timestamps assigned to communications transmitted between the wireless device and one or more other wireless devices on a same WiFi channel as the wireless device.Type: GrantFiled: July 21, 2015Date of Patent: March 14, 2017Assignee: Aruba Networks, Inc.Inventors: Peter Thornycroft, Neal Castagnoli, Gautam Bhanage
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Patent number: 9445226Abstract: The present disclosure discloses a method and network device for improving location accuracy in multi-channel wireless networks. Specifically, to coordinate with other Access Points (APs) and improve location accuracy of client devices, each access point can (a) obtain a schedule of another neighboring AP; (b) switch to the operating channel of the neighboring AP at a scheduled time for communication exchanges between the neighboring AP and the client device, (c) listen to the communication exchanges between the neighboring AP and the client device; (d) collecting signal samples, e.g., signal strength associated with messages originated from the client device; and (e) send the report to the location engine to allow the location engine collect more signal samples associated with the client device, thereby more accurately determine the location of the client device; etc.Type: GrantFiled: January 31, 2014Date of Patent: September 13, 2016Assignee: ARUBA NETWORKS, INC.Inventors: Neal Castagnoli, Peter Thornycroft, Berend Dunsbergen, Jie Jiang
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Patent number: 9438496Abstract: The present disclosure discloses a system and method for monitoring link quality between internetworking devices. The system includes a processor and a memory storing instructions that, when executed, cause the system to: generate, at a first internetworking device, a marker-request packet that includes a current marker ID; send, from the first internetworking device, the marker-request packet to a second internetworking device; receive, at the first internetworking device, a marker-reply packet that responds to the marker-request packet from the second internetworking device, the marker-reply packet including the current marker ID and a previous marker ID; and determine, at the first network device, a link quality between the first internetworking device and the second internetworking device based at least in part on the marker-reply packet.Type: GrantFiled: October 31, 2013Date of Patent: September 6, 2016Assignee: Aruba Networks, Inc.Inventors: Gopalakrishna Raman, Kiranmaye Sirigineni, Neal Castagnoli, Rajini Balay, Scott McGrath
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Publication number: 20160100286Abstract: Various techniques and systems are provided for determining a location of a target wireless device. Specifically, various techniques and systems are provided for determining a location of a wireless device using timestamps assigned to communications transmitted between the wireless device and one or more other wireless devices on a same WiFi channel as the wireless device. Implementations describe devices, computer-program products, and methods including transmitting a first frame by a network device on a channel of a radio frequency band, assigning a first timestamp to the frame, assigning a second timestamp to a second frame, determining a time difference between the first timestamp and the second timestamp, receiving an alternative time difference corresponding to an alternative network device, and determining a location of the client device using the time difference and the alternative time difference.Type: ApplicationFiled: July 21, 2015Publication date: April 7, 2016Inventors: Peter Thornycroft, Neal Castagnoli, Gautam Bhanage
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Publication number: 20160100287Abstract: Various techniques and systems are provided for determining a location of a target wireless device. Specifically, various techniques and systems are provided for determining a location of a wireless device using timestamps assigned to communications transmitted between the wireless device and one or more other wireless devices on a same WiFi channel as the wireless device.Type: ApplicationFiled: July 21, 2015Publication date: April 7, 2016Inventors: Peter Thornycroft, Neal Castagnoli, Gautam Bhanage
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Publication number: 20160037458Abstract: The present disclosure discloses a method and system for adaptive cell size management. The system can determine a minimum SNR value and one or more current environmental factors for a particular environment. Also, the system dynamically determines a minimum signal strength value for receiving wireless signals based on the minimum SNR value and the one or more current environmental factors, and configures a network device to receive signals with the minimum signal strength value. Alternatively, the system can estimate a particular coverage area such that a first set of wireless signals transmitted by devices located within the particular coverage area reach a network device at a minimum signal strength. The system then computes a transmission power such that a second set of wireless signals transmitted by the network device at the transmission power reaches an edge of the particular coverage area at a particular signal strength value.Type: ApplicationFiled: July 29, 2014Publication date: February 4, 2016Applicant: Aruba Networks, Inc.Inventors: Subburajan Ponnuswamy, Neal Castagnoli
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Publication number: 20150219742Abstract: The present disclosure discloses a method and network device for improving location accuracy in multi-channel wireless networks. Specifically, to coordinate with other Access Points (APs) and improve location accuracy of client devices, each access point can (a) obtain a schedule of another neighboring AP; (b) switch to the operating channel of the neighboring AP at a scheduled time for communication exchanges between the neighboring AP and the client device, (c) listen to the communication exchanges between the neighboring AP and the client device; (d) collecting signal samples, e.g., signal strength associated with messages originated from the client device; and (e) send the report to the location engine to allow the location engine collect more signal samples associated with the client device, thereby more accurately determine the location of the client device; etc.Type: ApplicationFiled: January 31, 2014Publication date: August 6, 2015Applicant: Aruba Networks, Inc.Inventors: Neal Castagnoli, Peter Thornycroft, Berend Dunsbergen, Jie Jiang
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Publication number: 20150117322Abstract: Embodiments of the present disclosure relate to physical layer resource utilization in wireless local area networks. In particular, the present disclosure relates to a policy-based control mechanism for wireless network physical layer resources such as transmit beamforming. Specifically, the disclosed system receives a set of network policy criteria, and information associated with each of a plurality of client devices connected to a network device. The disclosed system then selects a subset of client devices in a wireless network based on the set of network policy criteria and information associated with each of the plurality of client devices. Furthermore, the disclosed system provides the subset of client devices for using one or more of wireless network physical layer resources. Here, the wireless network physical layer resources are limited to a threshold number of client devices. Moreover, the number of client devices in the subset does not exceed the threshold number.Type: ApplicationFiled: October 30, 2013Publication date: April 30, 2015Applicant: Aruba Networks, Inc.Inventors: Scott McGrath, Neal Castagnoli
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Publication number: 20150117234Abstract: The present disclosure discloses a system and method for monitoring link quality between internetworking devices. The system includes a processor and a memory storing instructions that, when executed, cause the system to: generate, at a first internetworking device, a marker-request packet that includes a current marker ID; send, from the first internetworking device, the marker-request packet to a second internetworking device; receive, at the first internetworking device, a marker-reply packet that responds to the marker-request packet from the second internetworking device, the marker-reply packet including the current marker ID and a previous marker ID; and determine, at the first network device, a link quality between the first internetworking device and the second internetworking device based at least in part on the marker-reply packet.Type: ApplicationFiled: October 31, 2013Publication date: April 30, 2015Applicant: Aruba Networks, Inc.Inventors: Gopalakrishna Raman, Kiranmaye Sirigineni, Neal Castagnoli, Rajini Balay, Scott McGrath
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Patent number: 7613128Abstract: In one embodiment, a method involves selecting a connection, and attempting to establish a satisfactory link using that connection. If the link is not established, a reliability indicator associated with the connection is modified, to disfavor use of that connection. If the link is established, the reliability indicator associated with the connection is modified, to favor the use of that connection.Type: GrantFiled: April 9, 2007Date of Patent: November 3, 2009Assignee: Cisco Technology, Inc.Inventors: Neal Castagnoli, Shahriar Rahman, Lily Chen
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Publication number: 20070280275Abstract: In one embodiment, a method involves selecting a connection, and attempting to establish a satisfactory link using that connection. If the link is not established, a reliability indicator associated with the connection is modified, to disfavor use of that connection. If the link is established, the reliability indicator associated with the connection is modified, to favor the use of that connection.Type: ApplicationFiled: April 9, 2007Publication date: December 6, 2007Applicant: CISCO TECHNOLOGY, INC.Inventors: Neal Castagnoli, Shahriar Rahman, Lily Chen
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Publication number: 20060215582Abstract: Methods, apparatuses and systems directed to routing configuration in a hierarchical wireless mesh network. In one implementation, the present invention uses neighbor messages to allow routing nodes to discover one another and configure a hierarchical routing configuration. In one implementation, the present invention provides a neighbor and adjacency protocol that provides for automatic mesh configuration and loop-free mesh topologies.Type: ApplicationFiled: August 26, 2005Publication date: September 28, 2006Applicant: Cisco Technology, Inc.Inventors: Neal Castagnoli, Robert Friday
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Publication number: 20060215583Abstract: Methods, apparatuses and systems directed to synchronizing transmissions among parent and child routing nodes in a hierarchical wireless mesh network. In one implementation, the present invention employs a time slot scheduling algorithm to coordinate communications between wireless nodes of a hierarchical tree. In one implementation, the present invention provides a wireless mesh network where slot scheduling information propagates throughout the mesh, while individual nodes in the mesh compute their respective time slot schedules based on this information and the current state of the network. In one such implementation, a parent routing node computes its slot schedule and transmits certain parameters to its child nodes (as opposed to the schedule itself).Type: ApplicationFiled: August 26, 2005Publication date: September 28, 2006Applicant: Cisco Technology, Inc.Inventor: Neal Castagnoli
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Publication number: 20060215581Abstract: Methods, apparatuses and systems directed to providing an efficient failure recovery mechanism in hierarchical wireless mesh networks. In one implementation, the present invention mitigates the effect of synchronization loss between a parent and child node on the hierarchical wireless mesh network. In one implementation, the present invention employs a configuration scheme whereby the parent node failure timeouts are greater than the time to acquire a parent node to mitigate the effect of synchronization loss on downstream nodes in the hierarchical mesh network.Type: ApplicationFiled: August 26, 2005Publication date: September 28, 2006Applicant: Cisco Technology, Inc.Inventor: Neal Castagnoli
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Patent number: 4587046Abstract: Biologically active drugs, e.g. catecholamine hormones, are coupled to carrier molecules, e.g. monodisperse peptides to produce conjugate molecules. The conjugate molecules retain biological activity, but the pharmacokinetic, pharmacodynamic and/or potency properties of the drug is modified. The drug is coupled to the carrier via a spacer moiety which not only serves to covalently link the drug to the carrier, but also insulates the biologically active portion of the drug, i.e., the pharmacophore, from degradation during the coupling process. The carrier preferably consists of a monodisperse peptide in which the sequence of amino acid residues is carefully preselected and controlled.Type: GrantFiled: May 18, 1982Date of Patent: May 6, 1986Assignee: The Regents of the University of CaliforniaInventors: Murray Goodman, Neal Castagnoli, Kenneth Jacobson, Kenneth L. Melmon, Roberto P. Rosenkranz, Michael S. Verlander
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Patent number: 4337207Abstract: Biologically active derivatives of norepinephrine are disclosed. Such derivatives are catecholamines wherein isoproterenol is modified by extending the isopropyl functional grouping to an alkyl, aryl, or alkyl-aryl chain of variable length where said chain terminates in a carboxylic acid functional group, or in a substituted amide functional group. Such derivatives are .beta.-adrenergic and a number of such derivatives e.g., 6-(.beta.-3,4-dihydroxyphenyl-.beta.-hydroxy)-ethylamino heptanoic acid p-toluide, 6-(.beta.-3,4-dihydroxyphenyl-.beta.-hydroxy)-ethylamino heptanoic acid para-n-butyl anilide; 6-(.beta.,3,4-dihydroxyphenyl-.beta.-hydroxy)-ethylamino heptanoic acid para-methoxy anilide; 6-(.beta.-3,4-dihydroxyphenyl-.beta.-hydroxy)-ethylamino heptanoic acid paratrifluoromethyl anilide; and 6-(.beta.-3,4-dihydroxyphenyl-.beta.-hydroxy)-ethylamino heptanoic acid N-methyl para-toluide display a .beta.-adrenergic activity at least several orders of magnitude greater than isoproterenol itself.Type: GrantFiled: September 4, 1980Date of Patent: June 29, 1982Assignee: Regents of the University of CaliforniaInventors: Murray Goodman, Michael S. Verlander, Kenneth A. Jacobson, Kenneth L. Melmon, Neal Castagnoli