Patent ID: 11910322
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 21:
22. A base station operative to serve one or more low-power wireless devices in a wireless communication network, comprising:
a transceiver; and
processing circuitry operatively connected to the transceiver, and adapted to
generate a first wakeup signal at a first frequency directed to a wireless device or group of wireless devices, the first wakeup signal being transmitted using Frequency Shift Keying (FSK), wherein a state of an information bit is encoded as a positive or negative frequency offset from the first frequency;
transmit the first FSK wakeup signal;
generate a second FSK wakeup signal at a second frequency directed to the same wireless device or group of wireless devices, shifted from the first FSK wakeup signal frequency; and
transmit the second FSK wakeup signal after transmitting the first FSK wakeup signal.