COMMUNICATION TERMINAL IN WIRELESS SENSOR NETWORK AND METHOD FOR COMMUNICATING THEREOF

A communication terminal of a wireless sensor network and a communication method thereof are provided to suppress an increase by geometric progression of size of a contention window, even though frequency of attempting to transmit collected packets is increased. When collected packets are transmitted, a contention window of size set in an active section is set(413-419). If channel usage is not possible in the set contention window, another contention window of size linearly or exponentially expanded than the set contention window is reset in the active section(423,431). The resetting process is repeated. When the additional setup process is repeated, the size of the set contention window is linearly expanded into set expansive frequency. If the set expansive frequency elapses, the process of exponentially expanding the size of the set contention window is repeated.