Patents Assigned to Nivis , LLC
  • Patent number: 8254293
    Abstract: A network operating center for a network comprising known-location and unknown-location nodes can be configured to receive from each unknown-location node estimates of the distances from that node to each of its neighbor nodes. The network controller can then choose an initial location estimate for each unknown-location node and compute distances from the initial location estimates to the corresponding neighbor nodes. The network operating center can then choose subsequent location estimates of the unknown-location nodes by minimizing an error criterion based on a comparison of the received neighbor node distance estimates with the computed neighbor node distances.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: August 28, 2012
    Assignee: Nivis, LLC
    Inventors: Voicu Cristian, Marius Chilom, Robert Assimiti, Ovidiu Ratiu, Ion Ticus, Ioan Pocol
  • Patent number: 7956767
    Abstract: An automatic consumption meter reading system utilizing a radio frequency network and a power line carrier network is provided. The radio frequency (RF) network and the power line carrier (PLC) network are communicatively linked with a radio frequency to power line communication bridge device. The radio frequency to power line communication bridge device is communicatively linked to a consumption meter. An automatic meter reading device includes an RF modem and a PLC modem and transmits and receives data to and from a consumption meter using the RF and PLC modems.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: June 7, 2011
    Assignee: Nivis, LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom
  • Publication number: 20100098204
    Abstract: Systems and methods for regulating clock precision are disclosed. One embodiment is a method including receiving a clock signal from an oscillator, maintaining a signal count based on the clock signal; receiving a message comprising timing information from a remote device, calculating a drift value based at least in part on the timing information, and determining whether the drift is greater than a targeted clock accuracy. While the drift value is greater than the targeted clock accuracy, adjusting the signal count by the targeted clock accuracy, reducing the drift value by the targeted clock accuracy, and waiting a partial correction interval. If the drift value is less than the targeted clock accuracy, adjusting the signal count by the drift value. Then determining a receive time for a network message based at least in time on the signal count, and activating a wireless receiver based on the receive time to receive a message.
    Type: Application
    Filed: July 31, 2009
    Publication date: April 22, 2010
    Applicant: Nivis, LLC
    Inventors: Ovidiu Ratiu, Ion Ticus
  • Patent number: 7676195
    Abstract: A gateway node that communicates with a plurality of satellite nodes positioned on one or more logical layers is disclosed. Satellite nodes on the first logical layer operate as repeaters for nodes not on the first logical layer. The gateway node and each satellite node communicate outbound messages during a synchronized outbound communication time. Satellite nodes execute a receiving communication time that overlaps with a transmitting communication time for a satellite node on a logical layer that is one layer closer to the gateway node during the outbound communication time. The satellite nodes also communicate messages to the gateway node during a synchronized inbound communication time. Each satellite node executes a transmitting communication time that overlaps with a receiving communication time for a satellite node on a logical layer that is one layer closer to the gateway node during the inbound communication time so that messages are communicated to the gateway node.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: March 9, 2010
    Assignee: Nivis, LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus
  • Publication number: 20100027437
    Abstract: Systems and methods for determining link quality are disclosed. In one embodiment, a method includes the steps of transmitting a first quantity of messages to a remote device, receiving a second quantity of message acknowledgements from the remote device, determining a receive signal strength indicator (RSSI) value, comparing the RSSI value to a minimum RSSI threshold. If the RSSI value is greater than the minimum RSSI threshold, calculating an end-to-end link quality (EELQ) based at least in part on the percentage of message acknowledgements received and the link quality of the previous link in the network, determining a message success rate based on the first quantity and the second quantity, receiving a link quality from the remote device, and determining an end-to-end link quality (EELQ) value based at least in part on a previous EELQ value and the message success rate. Otherwise the EELQ value is set to 0.
    Type: Application
    Filed: July 31, 2009
    Publication date: February 4, 2010
    Applicant: Nivis, LLC
    Inventor: Ovidiu Ratiu
  • Publication number: 20100014443
    Abstract: A network operating center for a network comprising known-location and unknown-location nodes can be configured to receive from each unknown-location node estimates of the distances from that node to each of its neighbor nodes. The network controller can then choose an initial location estimate for each unknown-location node and compute distances from the initial location estimates to the corresponding neighbor nodes. The network operating center can then choose subsequent location estimates of the unknown-location nodes by minimizing an error criterion based on a comparison of the received neighbor node distance estimates with the computed neighbor node distances.
    Type: Application
    Filed: May 28, 2009
    Publication date: January 21, 2010
    Applicant: Nivis, LLC
    Inventors: Voicu Cristian, Marius Chilom, Robert Assimiti, Ovidiu Ratiu, Ion Ticus, Ioan Pocol
  • Patent number: 7627283
    Abstract: One or more electronic signs each coupled to a transceiver or radio node that is communicably coupled to an access node may change its display, as directed by the access node. The access node is configured to receive data related to adjusting information displayed on one or more of the electronic signs. The access node wirelessly transmits an outbound communication to a number of radio nodes logically distributed around the access node. One or more of the radio nodes or may be configured without an electronic sign but instead be configured to repeat the outbound communication. A recipient radio node receives the outbound communication message and executes instructions contained in the outbound communication message so that its electronic sign changes the display of information, such as the price.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: December 1, 2009
    Assignee: Nivis, LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus
  • Patent number: 7606210
    Abstract: A system and method for consolidating messages in a network comprising an access node coupled to a computer and a plurality of radio nodes coupled to sensing devices, such as a utility meter, is disclosed. Inbound message consolidation includes a radio node receiving two or more inbound messages that are consolidated. The radio node wirelessly transmits the consolidated message to a radio node logically closer to the access node or directly to the access node if the access node is within the transmission range of the radio node. The access node extracts the individual messages from the consolidated message upon receipt. For outbound messages, the access node consolidates original messages having common routes and transmits the consolidated message to a last node in the common route. The last node in the common route splits the consolidated message into the original messages and transmits each one to a destination radio node.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: October 20, 2009
    Assignee: NIVIS, LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus
  • Patent number: 7554941
    Abstract: A system for an access node coupled to a computer to wirelessly communicate with a plurality of disparately located radio nodes each coupled to a meter or other sensor is provided. The radio nodes within the communication range of the access node orient onto a first logical layer to directly communicate with the access node. Additional radio nodes beyond the communication range of the access node indirectly communicate with the access node by detecting communications from radio nodes on lower logical layers that are closer to the access node and selecting a radio node of the detected radio nodes to be a repeater node. The selected repeater node has available memory capacity and a suitable power number to qualify as a repeater, which may periodically change. Sensed data is directly or indirectly communicated to the access node for further communication to a backend system computer.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: June 30, 2009
    Assignee: Nivis, LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus
  • Publication number: 20090135750
    Abstract: A system and method for consolidating messages in a network comprising an access node coupled to a computer and a plurality of radio nodes coupled to sensing devices, such as a utility meter, is disclosed. Inbound message consolidation includes a radio node receiving two or more inbound messages that are consolidated. The radio node wirelessly transmits the consolidated message to a radio node logically closer to the access node or directly to the access node if the access node is within the transmission range of the radio node. The access node extracts the individual messages from the consolidated message upon receipt. For outbound messages, the access node consolidates original messages having common routes and transmits the consolidated message to a last node in the common route. The last node in the common route splits the consolidated message into the original messages and transmits each one to a destination radio node.
    Type: Application
    Filed: January 30, 2009
    Publication date: May 28, 2009
    Applicant: NIVIS,LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus
  • Patent number: 7505734
    Abstract: A method for a gateway node to wirelessly communicate with a plurality of satellite nodes coupled to a sensing device or an actuator on one or more logical layers is disclosed. The gateway node generates a broadcast message for communication to the plurality of satellite nodes that is thereafter transmitted during a gateway node transmit communication time to one or more satellite nodes on a first logical layer of nodes that are within a broadcast range of the gateway node. The satellite nodes on the first logical layer receive the broadcast message, execute instructions contained in the broadcast message, and repeat the broadcast message to one or more additional satellite nodes on a logical layer beyond the broadcast range of the gateway node. An acknowledgement message is communicated back to the gateway node from each satellite node indicating receipt and execution of the broadcast message.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: March 17, 2009
    Assignee: Nivis, LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus
  • Patent number: 7053770
    Abstract: Each of a plurality of satellite nodes coupled to a sensing device or an actuator and logically dispersed around an access node are configured to wirelessly communicate alarm conditions. A first satellite node detects and accesses an alarm condition and then prepares an alarm message containing an alarm code corresponding to the alarm condition and an address indication. The first satellite node may thereafter receive alarm messages from other satellite nodes logically further from the access node than the first satellite node. Alarm codes contained in the received alarm messages are filtered and compared to the alarm code of the prepared alarm message. The first satellite node includes a sender address in the prepared alarm message for each received alarm message containing an alarm code that matches the alarm code of the prepared alarm message. The first satellite node transmits the prepared alarm message to the access node.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: May 30, 2006
    Assignee: Nivis , LLC
    Inventors: Ovidiu Ratiu, Marius Ovidiu Chilom, Ion Ticus