Time synchronization and routing method in wireless sensor network, and apparatus for enabling the method

摘要

A time synchronization method in a wireless sensor network, a low power routing method using a reservation scheme, and an apparatus for performing the method are provided. The time synchronization method in the wireless sensor network may include: receiving a first synchronization request command packet from a parent node that manages time synchronization for a predetermined synchronization region; receiving, from the parent node, a second synchronization request command packet that has a transmission timestamp value of the first synchronization request command packet; and performing time synchronization for a child node based on a reception time of the first synchronization request command packet, a reception time of the second synchronization request command packet, and the transmission timestamp value of the first synchronization request command packet.

主权项

1. A time synchronization method in a wireless sensor network, the method comprising:
receiving a first synchronization request command packet from a parent node that manages time synchronization for a predetermined synchronization region; receiving, from the parent node, a second synchronization request command packet that has a transmission timestamp value of the first synchronization request command packet; and performing time synchronization for a child node based on a reception time of the first synchronization request command packet, a reception time of the second synchronization request command packet, and the transmission timestamp value of the first synchronization request command packet, wherein the performing of the time synchronization comprises obtaining a difference value between the reception time of the first synchronization request command packet and the reception time of the second synchronization request command packet and adding the difference value to the transmission timestamp value of the first synchronization request command packet to thereby match time information of the child node with time information of the parent node.