Patents by Inventor Dimitrios Koutsonikolas

Dimitrios Koutsonikolas 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).

  • Method and device for time synchronization in a TDMA multi-hop wireless network
    Patent number: 8305954
    Abstract: The invention concerns a method for synchronizing clocks of a set of nodes in a TDMA (“Time Division Multiple Access”) communication network comprising a plurality of nodes, among which some called time reference (TR) nodes are synchronized to a common time reference through a predetermined out-of-band synchronization mechanism, other nodes being called non-TR nodes, each node comprising an internal clock, characterized in that it comprises the steps of: transmitting, at the level of at least one of said TR nodes, a broadcast beacon packet during a given time slot of sub-frames, each sub-frame comprising a plurality of time slots; propagating among the remaining nodes said beacon packet using the slotted structure of the TDMA protocol, each node being pre-assigned a conflict-free time slot in a sub-frame to broadcast said beacon packet received from another node in a previous slot of said sub-frame; and updating in at least two of said non-TR nodes the internal clock based on an updated offset estimate, up
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: November 6, 2012
    Assignee: Thomson Licensing
    Inventors: Theodoros Salonidis, Dimitrios Koutsonikolas, Henrik Lundgren
  • Method and device for time synchronization in a TDMA multi-hop wireless network
    Publication number: 20090323669
    Abstract: The invention concerns a method for synchronizing clocks of a set of nodes in a TDMA (“Time Division Multiple Access”) communication network comprising a plurality of nodes, among which some called time reference (TR) nodes are synchronized to a common time reference through a predetermined out-of-band synchronization mechanism, other nodes being called non-TR nodes, each node comprising an internal clock, characterized in that it comprises the steps of: transmitting, at the level of at least one of said TR nodes, a broadcast beacon packet during a given time slot of sub-frames, each sub-frame comprising a plurality of time slots; propagating among the remaining nodes said beacon packet using the slotted structure of the TDMA protocol, each node being pre-assigned a conflict-free time slot in a sub-frame to broadcast said beacon packet received from another node in a previous slot of said sub-frame; and updating in at least two of said non-TR nodes the internal clock based on an updated offset estimate, up
    Type: Application
    Filed: June 25, 2009
    Publication date: December 31, 2009
    Inventors: Theodoros Salonidis, Dimitrios Koutsonikolas, Henrik Lundgren