Network entities, methods, apparatuses and communications networks for authenticating an event

Abstract

A method performed by a first network entity () for authenticating an event in a communications network () is provided. The first network entity () is configured to receive an event signal. The first network entity () is also configured to authenticate the event if the received event signal correlates with an 5 output signal of a closed-loop shift register in the first network entity (). Furthermore, the first network entity () is configured to trigger a change in the closed-loop shift register in order to obtain a subsequent output signal from the closed-loop shift register. A first network entity () for authenticating an event is also provided. Further, a wake-up receiver circuit () comprising the first network entity 10 () is provided, as well as, a wireless device () comprising the wake-up receiver circuit (). Furthermore, a second network entity () and a method therein for authenticating an event in at least one first network entity () in a communications network () are also provided. Also, a radio base station comprising the second network entity () is provided, as well as, 15 computer programs and communications networks.