Patents by Inventor Damon M. Stewart

Damon M. Stewart 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: 8804584
    Abstract: Wireless mesh network nodes in a mesh network are operable to receive a periodic beacon from at least one other mesh network node, where the received beacon comprises received beacon link quality information for the at least one other mesh network node. The nodes are further operable to record the sender identity and link quality of the received periodic beacon, record the received beacon link quality information in the beacon from the wireless mesh network node to the at least one other mesh network node, and retransmit a received periodic beacon to other network nodes, the retransmitted beacon comprising link quality information for beacons received in the wireless mesh network node.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: August 12, 2014
    Assignee: Digi International Inc.
    Inventor: Damon M. Stewart
  • Patent number: 8493946
    Abstract: Network devices in a multi-network wireless mesh network environment identify themselves as members of the network by receiving a broadcast message from a first mesh network device that has joined the wireless mesh network, and identifying that the broadcast transmission has been received such as by actuating a light, playing a sound, or sending an identifying reply message back to a broadcasting mesh network device.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: July 23, 2013
    Assignee: Digi International Inc.
    Inventor: Damon M. Stewart
  • Patent number: 8279842
    Abstract: In a mesh network having a plurality of wireless nodes, including a first, second, third and fourth node, wherein each node includes a routing table, a method of route discovery. A first route request message is broadcasted from the first node and received at the second and third nodes. In the second node, a link quality metric is calculated as a function of link quality of the link to the first node and as a function of capacity in the routing table of the second node. In the third node, a link quality metric is calculated as a function of link quality of the link to the first node and as a function of capacity in the routing table of the third node. A second route request message is broadcasted from the second node and received by the fourth node, wherein the second route request message includes the link quality metric calculated by the second node.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: October 2, 2012
    Assignee: Digi International Inc.
    Inventor: Damon M. Stewart
  • Publication number: 20100290441
    Abstract: In a mesh network having a plurality of wireless nodes, including a first, second, third and fourth node, wherein each node includes a routing table, a method of route discovery. A first route request message is broadcasted from the first node and received at the second and third nodes. In the second node, a link quality metric is calculated as a function of link quality of the link to the first node and as a function of capacity in the routing table of the second node. In the third node, a link quality metric is calculated as a function of link quality of the link to the first node and as a function of capacity in the routing table of the third node. A second route request message is broadcasted from the second node and received by the fourth node, wherein the second route request message includes the link quality metric calculated by the second node.
    Type: Application
    Filed: May 18, 2009
    Publication date: November 18, 2010
    Applicant: Digi International Inc.
    Inventor: Damon M. Stewart
  • Publication number: 20100080157
    Abstract: Wireless mesh network nodes in a mesh network are operable to receive a periodic beacon from at least one other mesh network node, where the received beacon comprises received beacon link quality information for the at least one other mesh network node. The nodes are further operable to record the sender identity and link quality of the received periodic beacon, record the received beacon link quality information in the beacon from the wireless mesh network node to the at least one other mesh network node, and retransmit a received periodic beacon to other network nodes, the retransmitted beacon comprising link quality information for beacons received in the wireless mesh network node.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 1, 2010
    Applicant: Digi International Inc.
    Inventor: Damon M. Stewart
  • Publication number: 20100080200
    Abstract: Network devices in a multi-network wireless mesh network environment identify themselves as members of the network by receiving a broadcast message from a first mesh network device that has joined the wireless mesh network, and identifying that the broadcast transmission has been received such as by actuating a light, playing a sound, or sending an identifying reply message back to a broadcasting mesh network device.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 1, 2010
    Applicant: Digi International Inc.
    Inventor: Damon M. Stewart
  • Publication number: 20090238109
    Abstract: A method of establishing a qualified route in a mesh network includes transmitting a route-discovery request from a source node such that transmitting includes transmitting the route-discovery request from the source node to at least one intermediate node that is a neighbor node to the source node, receiving the route-discovery request from an intermediate node at the destination node, and updating a route-discovery table for the intermediate node such that the route between the source node and the destination node is the only qualified route.
    Type: Application
    Filed: March 18, 2008
    Publication date: September 24, 2009
    Applicant: Digi International Inc.
    Inventors: Robert P. Byard, Stephen R. Thurber, Damon M. Stewart, Helaman D. Pratt Ferguson, John P. Filoso, Paul E. Millett, Hugh C. Nielsen