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

Claim 12:
13. A method of operating a base station serving one or more low-power wireless devices in a wireless communication network, comprising:
generating 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;
transmitting the first FSK wakeup signal;
generating 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
transmitting the second FSK wakeup signal after transmitting the first FSK wakeup signal.