Semtech Corporation
Collision mitigation in low-power, frequency-hopping, wide-area network
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Abstract:
A hopping spread-spectrum wireless network for IoT applications operating in a predetermined frequency band, with mobile device that have unsynchronized local frequency references and receiving gateways that are capable of detecting whether modulated radio signals will collide in frequency in a collision time interval, and blanking the signals in the collision time. Preferably, the frequency band is subdivided into a sub-bands, and the mobile devices adapt the width of the sub-bands used for transmission based on a synchronization status indicative of the frequency error of the local frequency reference.
Status:
Grant
Type:
Utility
Filling date:
11 Jun 2019
Issue date:
9 Feb 2021