Patents Assigned to Trapeze Networks, Inc.
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Publication number: 20120204031Abstract: A technique for improving authentication speed when a client roams from a first authentication domain to a second authentication domain involves coupling authenticators associated with the first and second authentication domains to an authentication server. A system according to the technique may include, for example, a first authenticator using an encryption key to ensure secure network communication, a second authenticator using the same encryption key to ensure secure network communication, and a server coupled to the first authenticator and the second authenticator wherein the server distributes, to the first authenticator and the second authenticator, information to extract the encryption key from messages that a client sends to the first authenticator and the second authenticator.Type: ApplicationFiled: April 16, 2012Publication date: August 9, 2012Applicant: TRAPEZE NETWORKS, INC.Inventor: Dan Harkins
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Patent number: 8238942Abstract: A technique for locating a device uses connectivity to find a distance between an access point (AP) and a device. The AP transmits a frame to a device and receives an acknowledgement frame from the device. The amount of time for a signal to pass between the AP and the device is estimated and multiplied by the speed of light to find the distance between the AP and the device.Type: GrantFiled: November 21, 2007Date of Patent: August 7, 2012Assignee: Trapeze Networks, Inc.Inventor: Matthew Stuart Gast
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Patent number: 8238298Abstract: A novel technique involves evaluating a real-time environment of a channel based on a nonlinear function of the number of neighbor radios and channel utilization requirements. The technique can be used to pick a channel for an AP that is added to a wireless network or to tune a channel for an existing AP. The technique can be applied to, for example, a relatively new wideband option in the 802.11n standard.Type: GrantFiled: September 15, 2008Date of Patent: August 7, 2012Assignee: Trapeze Networks, Inc.Inventors: Shiwei Zhao, Matthew S. Gast
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Publication number: 20120190320Abstract: A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate output signal strength value can be used to identify movement of a station as well as estimate locations and direction of movement.Type: ApplicationFiled: April 2, 2012Publication date: July 26, 2012Applicant: TRAPEZE NETWORKS, INC.Inventor: David B. Aragon
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Publication number: 20120190323Abstract: A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate output signal strength value can be used to identify movement of a station as well as estimate locations and direction of movement.Type: ApplicationFiled: April 2, 2012Publication date: July 26, 2012Applicant: Trapeze Networks, Inc.Inventor: David B. Aragon
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Patent number: 8218449Abstract: In some embodiments, a method includes combining operations of a wireless access point with operations of a remote probe. An access point links a wireless client to a wireless switch. A remote probe captures wireless packets, appends radio information, and forwards packets to a remote observer for analysis. In an embodiment, the observer may provide a protocol-level debug. A system according to the technique can, for example, accomplish concurrent in-depth packet analysis of one or more interfaces on a wireless switch. The system can also, for example, augment embedded security functions by forwarding selected packets to a remote Intrusion Detection System (IDS). In an embodiment, filters on the probes may reduce overhead.Type: GrantFiled: July 9, 2009Date of Patent: July 10, 2012Assignee: Trapeze Networks, Inc.Inventor: Ron Taylor
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Patent number: 8203986Abstract: A technique for controlling the amount of power consumed by access points (APs) of a wireless network involves implementing throttleable APs (TAPs). It would be desirable for the TAPs to be in a relatively low power mode during periods of low activity, and switch to a high power mode in response to increased wireless activity. To that end, a throttling engine can be implemented to throttle TAPs up in power in response to increases in wireless activity, and throttle TAPs down in power in response to decreases in wireless activity.Type: GrantFiled: February 4, 2009Date of Patent: June 19, 2012Assignee: Trapeze Networks, Inc.Inventors: David Bradburn Aragon, Matthew Stuart Gast
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Publication number: 20120140705Abstract: A technique for wireless network monitoring involves scanning channels using clients instead of access points. An example of a method according to the technique may include, for example, receiving from a wireless access point a command to perform a channel scanning function, listening on a channel associated with the channel scanning function, and sending RF data found on the channel to the wireless access point. Another example of a method according to the technique may include, for example, scanning a first channel, switching from the first channel to a second channel, sending data on the second channel to an access point, switching from the second channel to the first channel, and resuming scanning on the first channel. A system according to the technique may include one or more scanning clients, proxy clients, multi-channel clients, or other clients that are capable of scanning channels in lieu of an access point.Type: ApplicationFiled: February 14, 2012Publication date: June 7, 2012Applicant: TRAPEZE NETWORKS, INC.Inventors: Sudheer Poorna Chandra Matta, Manish Tiwari
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Patent number: 8161278Abstract: A technique for improving authentication speed when a client roams from a first authentication domain to a second authentication domain involves coupling authenticators associated with the first and second authentication domains to an authentication server. A system according to the technique may include, for example, a first authenticator using an encryption key to ensure secure network communication, a second authenticator using the same encryption key to ensure secure network communication, and a server coupled to the first authenticator and the second authenticator wherein the server distributes, to the first authenticator and the second authenticator, information to extract the encryption key from messages that a client sends to the first authenticator and the second authenticator.Type: GrantFiled: March 10, 2009Date of Patent: April 17, 2012Assignee: Trapeze Networks, Inc.Inventor: Dan Harkins
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Patent number: 8150357Abstract: A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate output signal strength value can be used to identify movement of a station as well as estimate locations and direction of movement.Type: GrantFiled: March 28, 2008Date of Patent: April 3, 2012Assignee: Trapeze Networks, Inc.Inventor: David B. Aragon
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Publication number: 20120051353Abstract: A technique for associating clients with APs in an advantageous manner may involve local balancing of clients across APs. This may involve providing instructions to APs to disable client association. Alternatively, this technique may involve load balancing across controllers.Type: ApplicationFiled: November 4, 2011Publication date: March 1, 2012Applicant: TRAPEZE NETWORKS, INC.Inventors: David B. ARAGON, Liang-Jong Huang
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Patent number: 8126481Abstract: A technique for locating a device uses connectivity to find a distance between an access point (AP) and a device. The AP transmits a frame to a device and receives an acknowledgement frame from the device. The amount of time for a signal to pass between the AP and the device is estimated and multiplied by the speed of light to find the distance between the AP and the device.Type: GrantFiled: November 21, 2007Date of Patent: February 28, 2012Assignee: Trapeze Networks, Inc.Inventor: Matthew Stuart Gast
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Patent number: 8116275Abstract: A technique for wireless network monitoring involves scanning channels using clients instead of access points. An example of a method according to the technique may include, for example, receiving from a wireless access point a command to perform a channel scanning function, listening on a channel associated with the channel scanning function, and sending RF data found on the channel to the wireless access point. Another example of a method according to the technique may include, for example, scanning a first channel, switching from the first channel to a second channel, sending data on the second channel to an access point, switching from the second channel to the first channel, and resuming scanning on the first channel. A system according to the technique may include one or more scanning clients, proxy clients, multi-channel clients, or other clients that are capable of scanning channels in lieu of an access point.Type: GrantFiled: May 21, 2010Date of Patent: February 14, 2012Assignee: Trapeze Networks, Inc.Inventors: Sudheer Poorna Chandra Matta, Manish Tiwari
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Publication number: 20120034943Abstract: A technique for wireless load balancing involves providing a wireless infrastructure that creates a target band option and helps push clients toward that band. An example of a method according to the technique involves, by way of example but not limitation, responding only to probe requests on a first band when a client is detected on the first band and a second band. For example, using the techniques described herein, a platform that is both 802.11a and 802.11b/g compliant may attempt to connect preferentially to the 802.11b/g band of a wireless network, and be migrated toward the 802.11a band instead.Type: ApplicationFiled: October 13, 2011Publication date: February 9, 2012Applicant: TRAPEZE NETWORKS, INC.Inventor: Sudheer Poorna Chandra MATTA
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Publication number: 20110255466Abstract: A technique for improved throughput at an access point (AP) involves when frames are received for transmission by the AP, queuing the frames for a particular station. A system constructed according to the technique may include an aggregation and queuing layer. Station queues may be processed by the aggregation and queuing layer before being given to radio hardware for transmission. In an illustrative embodiment, when frames are received by the aggregation and queuing layer, the packet will be assigned a target delivery time (TDT) and an acceptable delivery time (ADT). The TDT is the “ideal” time to transmit a frame, based on its jitter and throughput requirements. Frames are mapped on to a time axis for transmission by TDT. In an illustrative embodiment, each frame is mapped by priority, so that there are separate maps for voice, video, best effort, and background frames. There will be gaps between frames for transmission that can be used for aggregation.Type: ApplicationFiled: January 14, 2011Publication date: October 20, 2011Applicant: TRAPEZE NETWORKS, INC.Inventors: Matthew Stuart Gast, Richard Thomas Bennett
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Publication number: 20110158122Abstract: A technique involves untethered access points (UAPs) that can broadcast estimated transmission time (ETT) that represents an estimated time it would take for a packet to be transmitted from the first UAP to an AP that is wire coupled to a network. The proposed system can offer, among other advantages, accurate ETT values for use by UAPs of a wireless network.Type: ApplicationFiled: March 7, 2011Publication date: June 30, 2011Applicant: TRAPEZE NETWORKS, INC.Inventors: James Murphy, Gary Morain
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Publication number: 20110128858Abstract: A technique for wireless network monitoring involves scanning channels using clients instead of access points. An example of a method according to the technique may include, for example, receiving from a wireless access point a command to perform a channel scanning function, listening on a channel associated with the channel scanning function, and sending RF data found on the channel to the wireless access point. Another example of a method according to the technique may include, for example, scanning a first channel, switching from the first channel to a second channel, sending data on the second channel to an access point, switching from the second channel to the first channel, and resuming scanning on the first channel. A system according to the technique may include one or more scanning clients, proxy clients, multi-channel clients, or other clients that are capable of scanning channels in lieu of an access point.Type: ApplicationFiled: May 21, 2010Publication date: June 2, 2011Applicants: Trapeze Networks, Inc., Belden Inc.Inventors: Sudheer Poorna Chandra Matta, Manish Tiwari
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Patent number: 7912982Abstract: A technique involves untethered access points (UAPs) that can broadcast estimated transmission time (ETT) that represents an estimated time it would take for a packet to be transmitted from the first UAP to an AP that is wire coupled to a network. The proposed system can offer, among other advantages, accurate ETT values for use by UAPs of a wireless network.Type: GrantFiled: November 22, 2006Date of Patent: March 22, 2011Assignee: Trapeze Networks, Inc.Inventors: James Murphy, Gary Morain
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Patent number: 7873061Abstract: A technique for improved throughput at an access point (AP) involves when frames are received for transmission by the AP, queuing the frames for a particular station. A system constructed according to the technique may include an aggregation and queuing layer. Station queues may be processed by the aggregation and queuing layer before being given to radio hardware for transmission. In an illustrative embodiment, when frames are received by the aggregation and queuing layer, the packet will be assigned a target delivery time (TDT) and an acceptable delivery time (ADT). The TDT is the “ideal” time to transmit a frame, based on its jitter and throughput requirements. Frames are mapped on to a time axis for transmission by TDT. In an illustrative embodiment, each frame is mapped by priority, so that there are separate maps for voice, video, best effort, and background frames. There will be gaps between frames for transmission that can be used for aggregation.Type: GrantFiled: December 28, 2006Date of Patent: January 18, 2011Assignee: Trapeze Networks, Inc.Inventors: Matthew Stuart Gast, Richard Thomas Bennett
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Patent number: 7865213Abstract: A technique for improving radio coverage involves using interdependently tuned directional antennas. An example according to the technique is a substrate including two antennas, a transceiver, and a connector. Another example system according to the technique is a wireless access point (AP) including a processor, memory, a communication port, and a PCB comprising a plurality of directional antennas and a radio. An example method according to the technique involves determining a voltage standing wave ratio (VSWR) and interdependently tuning a first and second directional antenna to reach an expected radiation pattern.Type: GrantFiled: December 2, 2009Date of Patent: January 4, 2011Assignee: Trapeze Networks, Inc.Inventor: Philip Riley