LOW-POWER, FREQUENCY-HOPPING, WIDE-AREA NETWORK WITH RANDOM MEDIUM ACCESS

摘要

A hopping spread-spectrum wireless network for loT applications. The network includes mobile devices with unsynchronized local clocks that transmit including, in a preamble portion, a plurality of sync words, each combined with at least one instance of a sequential index. The hopping frequencies at which the sync word are transmitted are different. This arrangement helps detection and synchronization of the signals, despite the unavoidable frequency mismatches and collisions.