Patent ID: 9014213
Filing Date: 2015-04-21
Classification: H04B,H04W

Abstract:
1. A communication method of synchronization relay, the communication method comprising: transmitting a preamble, from at least one first node, to a second node that fails to acquire synchronization in a wireless network that includes the at least one first node having acquired synchronization; receiving, by the second node, the preamble transmitted from the at least one first node; acquiring, by the second node, time synchronization using the preamble; and selecting, by the second node having the time synchronization, a node among the at least one first node determined to have a common time reference and performing synchronization relay from the selected node through a predetermined position of a frame transmitted, wherein the receiving of the preamble includes receiving a network management unit (NMU) message from the at least one first node, and the NMU message includes a field having a plurality of bits in which a bit represents at least one of whether requesting a corresponding neighboring node to transmit a preamble and whether requesting a corresponding neighboring node to stop transmission of a preamble, and an arrangement order of bits included in the field is mapped with an arrangement order of neighboring node identifiers arranged in a neighboring node information field.