Synchronization in a wireless node
AssigneeHewlett-Packard Development Company, L.P.
InventorsJung Gun Lee, Raul Herman Etkin, Sung-Ju Lee, Anil Gupta, Vincent Ma
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Abstract
A wireless node receives a beacon from a wireless access point. The beacon includes a wireless protocol time synchronization function (TSF) timestamp generated with reference to a global clock for a network. The wireless node synchronizes a counter according to the TSF timestamp. The wireless node receives a global timing offset (GTO) packet from the wireless access point and combines the GTO packet with a counter value to generate a global timestamp.
Claims19
A method, comprising:
- a wireless node receiving from a wireless access point a beacon having a wireless protocol time synchronization function (TSF) timestamp generated with reference to a global clock for a network;
- synchronizing a counter on the wireless node according to the TSF timestamp;
- receiving a global timing offset (GTO) information from the wireless access point;
- and
- combining a GTO value from the GTO packet with a counter value to generate a global timestamp.
A wireless node, comprising:
- a receiver to receive a timing synchronization function (TSF) timestamp from a wireless access point in a network, wherein the TSF timestamp is synchronized to a global clock for the network;
- a counter update module to update a counter according to the TSF timestamp;
- and
- a timing module to
- receive a global timing offset (GTO) message for the network, and
- combine GTO information with counter information to generate a global timestamp.
A system, comprising:
- a plurality of wireless access points associated with a network, each having a clock that is synchronized to a global clock for the network;
- a cluster of wireless nodes associated with each access point in the network, wherein wireless nodes are time synchronized to each other across clusters via timing synchronization function (TSF) timestamps sent from respective wireless access points.
A computer-readable storage medium containing instructions that, when executed, cause a computer to:
- synchronize a counter on a wireless node according to a received wireless protocol time synchronization function (TSF) timestamp generated with reference to a global clock for a network;
- receive a global timing offset (GTO) packet from a wireless access point;
- and
- combine a GTO value from the GTO packet with a counter value to form a global timestamp.
Dependencies are inferred from the claim text.