公开(公告)号：US10477585B1

公开(公告)日：2019-11-12

申请号：US16049593

申请日：2018-07-30

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Chirag Bhavsar ,  Huanchun Ye ,  Varadarajan Gopalakrishnan ,  QingYun Wei ,  Morris Hsu ,  James Edwin Christy

IPC: H04W74/08 ,  H04B15/02 ,  G06F3/16

Abstract: Microwave interference mitigation techniques and systems are disclosed herein. In some embodiments, microwave interference mitigation involves coordinating wireless traffic in accordance with a magnetron's on-and-off cycle so that data is not sent during the magnetron's on period, and is exclusively sent during the magnetron's off period. Wireless traffic can be coordinated using a voltage monitoring and zero-crossing point detection technique coupled with a Clear To Send (CTS) packet. For non-microwave devices, wireless traffic coordination can be achieved using a pattern matching algorithm coupled with a Clear Channel Assessment (CCA) threshold adjustment during the magnetron's on-and-off cycles. Additional, or alternative, microwave interference mitigation techniques involve decreasing a maximum packet size for data packets that are to be transmitted wirelessly in the environment, which guarantees successful transmission of data packets during the magnetron's off periods.