SYSTEM AND METHOD FOR DYNAMIC CHANNEL ALLOCATION FOR AVOIDING FREQUENCY INTERFERENCE

摘要

The invention relates to a dynamic channel allocation method for avoiding frequency interference, comprising the following steps: activating a ubiquitous sensor network (USN) module and a wireless fidelity (WiFi) module when power is applied to a dynamic channel allocation system that uses both a USN and WiFi; enabling the USN module to transmit messages to neighboring USN motes, and gather information on the number of USN motes in accordance with whether or not acknowledgement messages are received from the neighboring USN motes; analyzing a WiFi frequency channel and a USN frequency channel to detect the USN frequency channel with which the WiFi frequency channel interferes; enabling the WiFi module to search for a neighboring WiFi communication channel to gather channel scan information of a WiFi access point, detect the residual changed USN frequency channel other than the USN frequency channel being interfered with and corresponding to the channel scan information, and transmit the detected USN frequency channel to neighboring USN motes; and controlling the change of the USN frequency channel of the neighboring USN motes to the changed USN frequency channel such that data transmission is performed through the changed channel.