Invention Grant
- Patent Title: Microwave interference mitigation
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Application No.: US16049593Application Date: 2018-07-30
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Publication No.: US10477585B1Publication Date: 2019-11-12
- Inventor: Kun Ting Tsai , Chirag Bhavsar , Huanchun Ye , Varadarajan Gopalakrishnan , QingYun Wei , Morris Hsu , James Edwin Christy
- Applicant: Amazon Technologies, Inc.
- Applicant Address: US WA Seattle
- Assignee: Amazon Technologies, Inc.
- Current Assignee: Amazon Technologies, Inc.
- Current Assignee Address: US WA Seattle
- Agency: Lee & Hayes, P.C.
- Main IPC: H04W74/08
- 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.
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