公开(公告)号：US11777862B2

公开(公告)日：2023-10-03

申请号：US17504794

申请日：2021-10-19

Applicant: NXP B.V.

Inventor： Khurram Waheed ,  Yaoqiao Li

IPC: H04L47/27 ,  H04W56/00

CPC classification number: H04L47/27 ,  H04W56/001

Abstract: Disclosed is a method of operating a low power wireless receiver in which a radio is periodically operable for receive intervals with sleep intervals therebetween and comprising a sleep clock having a sleep clock accuracy. A first transmission or packet is received. Based on a start moment of the first received packet, and an expected interval between packets, a nominal start moment is determined to start the radio for a packet window until a nominal end moment, for receiving a second packet; the packet window duration is extended in dependence on an estimated drift based on the SCA to provide a widened window. A start moment of a second received packet is measured within the widened window. An actual drift is calculated, from the start moment of the second packet; and an actual start moment and an actual window duration is determined, for receiving a third packet, based on the actual drift.

公开(公告)号：US20220278938A1

公开(公告)日：2022-09-01

申请号：US17504794

申请日：2021-10-19

Applicant: NXP B.V.

Inventor： Khurram Waheed ,  Yaoqiao Li

IPC: H04L12/807 ,  H04W56/00

Abstract: Disclosed is a method of operating a low power wireless receiver in which a radio is periodically operable for receive intervals with sleep intervals therebetween and comprising a sleep clock having a sleep clock accuracy. A first transmission or packet is received. Based on a start moment of the first received packet, and an expected interval between packets, a nominal start moment is determined to start the radio for a packet window until a nominal end moment, for receiving a second packet; the packet window duration is extended in dependence on an estimated drift based on the SCA to provide a widened window. A start moment of a second received packet is measured within the widened window. An actual drift is calculated, from the start moment of the second packet; and an actual start moment and an actual window duration is determined, for receiving a third packet, based on the actual drift.