Wireless Stream Broadcast System using Spectrum-Impact-Smoothed Channel Sequencing and Deferred Acknowledgments

    公开(公告)号:US20190045519A1

    公开(公告)日:2019-02-07

    申请号:US15669047

    申请日:2017-08-04

    IPC分类号: H04W72/12 H04B1/715 H04W72/00

    摘要: Disclosed herein are wireless devices operable at intermediate wireless at ranges of thousands of meters, utilizing packets that include a preamble and a data payload. Devices may be such things as keypads, door latches, occupancy monitors, sprinkler controllers and other devices needing a communications link. A digital spread-spectrum frequency hopping rotation is used, wherein packet transmissions rotate through frequency sequences. Used is a spectrum-impact-smoothed channel sequence, each channel specifying a unique preamble frequency relative to the other sequences and channels. The set is traversed as a broadcasted stream is transmitted, thereby distributing the focused radio-frequency emission impact of packets having long preambles over time. Packet acknowledgments are deferred until a group of packets in a stream has been exchanged. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.

    System and device for evened frequency emission impact distribution using a preamble-based DSS communication link

    公开(公告)号:US09979435B1

    公开(公告)日:2018-05-22

    申请号:US15587760

    申请日:2017-05-05

    IPC分类号: H04L29/08 H04B1/7156

    CPC分类号: H04B1/7156 H04L67/125

    摘要: Disclosed herein are hub-based wireless networks employing end-devices at intermediate wireless at ranges of thousands of meters, utilizing packets that include a preamble and a data payload. End-devices may be such things as keypads, door latches, occupancy monitors, sprinkler controllers and other devices controlled or monitored in a campus or a collection of buildings. A digital spread-spectrum frequency hopping rotation is used, wherein packet transmissions rotate through frequency sequences to spread radio-frequency emissions impact over a set of frequencies. A spectrum-impact-smoothed channel set is fashioned using sequences that each specify a unique preamble frequency relative to the other sequences and channels. The set is traversed as packets are transmitted, thereby distributing the focused radio-frequency emission impact of packets having long preambles over time. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.