Method for channel management and data transmission in wireless sensor network

A method for managing channel of a reception node included in a wireless sensor network, the method comprising:

• when a data frame is not received in at least one of a plurality of channels used in the wireless sensor network, counting the number of times of not receiving a data frame;
• when the number of times of not receiving a data frame from a first transmission node through a first channel among a plurality of channels is n, changing a state of the first channel into an unavailable state;
• and
• informing the first transmission node about the unavailable state of the first channel through a second channel among the plurality of channels;
• wherein the changing of the state of the first channel into the unavailable state comprises:
• changing the state of the first channel in a channel table stored in the reception node;
• and
• generating an unavailable channel bitmap through the channel table;
• and
• wherein the informing of the first transmission node about the unavailable state of the first channel comprises:
• after the state of the first channel is changed into the unavailable state, receiving a data frame from the first transmission node through the second channel;
• and
• informing the first transmission node about the unavailable state of the first channel by using an ACK frame with respect to the received data frame.