in one embodiment 4g lf nbf and 5g hf bf carrier can be from same bs or different bs wake up indication can be sent using a field in dci it can be send using mac ce or rrc message and the wake up indication also referred as beam measurement indication requesting the ue to perform bema measurement referring to fig2 b in an embodiment an indication 2560 2565 can be sent on same carrier i e 5g carrier 2540 indicating whether the dl data will be scheduled or indication to wake up in upcoming drx cycle 2530 or indication 2560 2565 can be sent indicating the ue to wake up and perform beam measurement on same carrier 2540 the drx cycle 2530 consists of an u2018 on duration u2019 2410 and a u2018 drx period u2019 or u2018 off duration u2019 2420 the network configures the ue with time and frequency resources for monitoring this indication 2560 2565 if the ue receives indication 2560 2565 indicating that dl data will be scheduled or indicating the ue to wake up or indicating the ue to wake up and perform beam measurement then the ue will perform beam measurement and monitor dl on that carrier the indication 2560 2565 can be sent at an offset t from the start of u2018 on duration u2019 2510 2515 on the carrier 2540 the offset t can be the time needed to perform full tx rx beam sweeping for beam.