Patent ID: 11968601
Assignee: ZAINAR, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC G  H  Y | IPC H

Claim 14:
15. A method comprising:
during a first time period:
generating a response schedule for a first asset tag group, the response schedule defining:
a first multicast trigger time for transmission of a first multicast trigger to the first asset tag group; and
for each asset tag in the first asset tag group:
a first wake window intersecting the first multicast trigger;
a first transmit time succeeding receipt of the first multicast trigger and unique to the asset tag; and
a second wake window intersecting the first transmit time;

at a first node in a set of nodes:
broadcasting a first configuration message via a configuration channel to the first asset tag group; and

at a first asset tag in the first asset tag group:
in response to absence of configuration data, transitioning a first transceiver of the first asset tag to the configuration channel;
receiving the first configuration message via the configuration channel;
configuring the first asset tag based on the first configuration message; and
based on the response schedule indicating that a first time duration until the first wake window exceeds a threshold time duration, entering a sleep mode;

during the first wake window:
at the first node in the set of nodes:
broadcasting the first multicast trigger via a ranging channel; and

at the first asset tag in the first asset tag group:
entering a wake mode;
receiving the first multicast trigger via the ranging channel; and
based on the response schedule indicating that a second time duration until the second wake window exceeds the threshold time duration, entering the sleep mode; and

during the second wake window:
at the first asset tag in the first asset tag group:
entering the wake mode;
transmitting a first ranging signal via the ranging channel; and
in response to transmitting the first ranging signal, entering the sleep mode;

at the set of nodes:
receiving a first set of ranging signals from the first asset tag group; and

deriving a first set of locations of the first asset tag group based on the first set of ranging signals received by the set of nodes.