Patents Assigned to Dust Networks, Inc.
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Patent number: 7961664Abstract: A method for a digraph linked network to provide subnetwork communication is disclosed. The method running a first superframe in a digraph linked network containing at least one digraph link wherein a digraph link is a directional link specifying routing information between a first node and a second node in the digraph linked network. The method further comprises running a second superframe in a digraph linked network containing at least one digraph link.Type: GrantFiled: June 13, 2005Date of Patent: June 14, 2011Assignee: Dust Networks, Inc.Inventors: Kristofer S. J. Pister, Robert M. Shear
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Patent number: 7898322Abstract: Frequency demodulation of a signal is disclosed. A first edge event and a second edge event are detected in a signal. The second edge event is an edge event subsequent in time to the first edge event. A data bit based at least in part on a timing interval between the first edge event and the second edge event is determined.Type: GrantFiled: April 18, 2008Date of Patent: March 1, 2011Assignee: Dust Networks, Inc.Inventors: Mark Lemkin, Brett Warneke
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Patent number: 7881239Abstract: A device for a node in a digraph network comprising is disclosed. The device comprises an internal time reference, a radio receiver, a radio transmitter. The device further comprises a temperature sensor for stabilizing the internal time reference against drifting with respect to an internal time reference of another node in the network and a microprocessor for managing the reception and transmission of information.Type: GrantFiled: May 10, 2005Date of Patent: February 1, 2011Assignee: Dust Networks, Inc.Inventors: Kristofer S. J. Pister, Yuri S. Zats, Robert Alan Contant, Noah Treuhaft
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Patent number: 7873043Abstract: A method of assigning cells in a superframe using digraph link information in a network of nodes is disclosed. The method comprises determining a total number of desired digraph links in the network of nodes wherein a digraph link is a directional link specifying routing information at each node in the network between said node and a second node, and wherein the network of nodes includes a plurality of nodes each with a plurality of digraph links. The method further comprises selecting a superframe size at least large enough to accommodate the total number of desired digraph links and assigning each desired digraph link to a cell in the superframe wherein each cell in the superframe specifies a synchronized time and frequency communication plan.Type: GrantFiled: July 25, 2008Date of Patent: January 18, 2011Assignee: Dust Networks, Inc.Inventors: Kristofer S. J. Pister, Robert M. Shear
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Patent number: 7791419Abstract: Timing calibrator is disclosed. A first oscillator includes an output. The first oscillator includes a mechanically resonant element. A second oscillator includes an output. The second oscillator includes a quartz resonator. A frequency relater has an output, a first input, and a second input. The frequency relater has the first input coupled to the first oscillator output and the second input coupled to the second oscillator output.Type: GrantFiled: April 9, 2008Date of Patent: September 7, 2010Assignee: Dust Networks, Inc.Inventor: Mark Lemkin
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Patent number: 7787427Abstract: Communicating using a wireless mesh network is disclosed. A route is determined from a first node to each other node in the wireless mesh network including one or more intermediate nodes that receive and transmit the packet. A frame length used for communicating a packet is selected based on the routes from the first node to each other node in the wireless mesh network. Node to node communications are selected within the frame along the route such that a predetermined average communication latency time is achieved.Type: GrantFiled: January 9, 2007Date of Patent: August 31, 2010Assignee: Dust Networks, Inc.Inventors: Jonathan Simon, Lance R. Doherty
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Patent number: 7742435Abstract: Communicating for a mesh network is disclosed. A battery-powered node is assigned to communicate with a sending powered backbone node. The sending powered backbone node is assigned to either a first group or a second group. If the sending powered backbone node is assigned to the first group, then the sending powered backbone node sends a packet to either a gateway node or a second group receiving powered backbone node that is assigned to the second group and that is closer to the gateway node. If the sending powered backbone node is assigned to the second group, then the sending powered backbone node sends a packet to either a gateway node or a first group receiving powered backbone node that is assigned to the first group and that is closer to the gateway node.Type: GrantFiled: July 27, 2007Date of Patent: June 22, 2010Assignee: Dust Networks, Inc.Inventors: Lance R. Doherty, Jonathan Simon, William Alan Lindsay
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Patent number: 7630326Abstract: Configuring mesh networks based on an application is disclosed. An indication is received that a status is changed. In the event that the change in status requires a change in a mesh network configuration, a notice is transmitted to change the mesh network configuration and a local change required for the change in the mesh network configuration is initiated.Type: GrantFiled: March 7, 2006Date of Patent: December 8, 2009Assignee: Dust Networks, Inc.Inventor: Robert M. Shear
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Patent number: 7529217Abstract: In a packet communication network, a method and apparatus for packet switched transport is provided among intelligent nodes wherein the duty cycling of the intelligent nodes is minimized in order to maximize power life using a synchronization algorithm that assures all nodes are able to propagate information through the network without undue use of transmission and reception power. Frequency hopping time-division multiple access supports packet communication between intelligent nodes via assigned directed links, each link being assigned to a time-channel offset (cell) in a superframe, so that a link carrying a packet string between any two intelligent nodes is active only during its assigned time slot. The result is efficient use of spectrum and minimal expenditure of power.Type: GrantFiled: October 6, 2004Date of Patent: May 5, 2009Assignee: Dust Networks, Inc.Inventors: Kristofer S. J. Pister, Yuri S. Zats, Rob Conant, Noah Treuhaft
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Patent number: 7420980Abstract: A method of assigning cells in a superframe using digraph link information in a network of nodes is disclosed. The method comprises determining a total number of desired digraph links in the network of nodes wherein a digraph link is a directional link specifying routing information at each node in the network between said node and a second node, and wherein the network of nodes includes a plurality of nodes each with a plurality of digraph links. The method further comprises selecting a superframe size at least large enough to accommodate the total number of desired digraph links and assigning each desired digraph link to a cell in the superframe wherein each cell in the superframe specifies a synchronized time and frequency communication plan.Type: GrantFiled: June 13, 2005Date of Patent: September 2, 2008Assignee: Dust Networks, Inc.Inventors: Kristofer S. J. Pister, Robert M. Shear
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Patent number: 7375594Abstract: Tuning a radio oscillator frequency to a reference frequency is disclosed. A radio oscillator is set using a predetermined value loaded into an adjustment bit array. A highest selected bit is selected to be used in locating a final tuned value for the adjustment bit array. The final tuned value is determined by successively setting a selected bit starting with the highest selected bit in the adjustment bit array. And, the selected bit value in the final tuned value is determined using a measurement of the radio oscillator frequency and its relation to a reference frequency.Type: GrantFiled: July 11, 2006Date of Patent: May 20, 2008Assignee: Dust Networks, Inc.Inventors: Mark Lemkin, Ben Cook