Patent ID: 9209959
Filing Date: 2015-12-08
Classification: H04L,H04W

Abstract:
1. A method of frequency synchronization of a node entering a distributed network, the method comprising: receiving preambles from a plurality of neighbor nodes adjacent to the node, the node and the plurality of neighbor nodes receiving and transmitting data therebetween using orthogonal frequency division multiple (OFDM) access; estimating offsets of carrier frequencies from the received preambles, for each of the plurality of neighbor nodes; calculating an average value of the estimated offsets; receiving an adjustment request value of the carrier frequencies that is calculated from the plurality of neighbor nodes; calculating an adjustment value of the carrier frequencies with respect to the entirety of the plurality of neighbor nodes based on the average value and the adjustment request value; and adjusting a carrier frequency of the node on the basis of the adjustment value, wherein each of the plurality of neighbor nodes is a node that has transmitted the preamble that is received more than a predetermined number of times by the node.