Patent ID: 8724477

Claim:
A communication terminal comprising: a transmitter and receiver configured to transmit or receive a signal using a frequency channel selected by switching between a plurality of frequency channels; an interference detector configured to determine, for each respective frequency channel of the plurality of frequency channels, whether or not interference occurs when transmitting or receiving the signal using the respective frequency channel; and a timing setting unit configured to set a timing of when said transmitter and receiver transmits or receives the signal, the timing being set according to a number of frequency channels, of the plurality of frequency channels, for which no interference is detected by said interference detector, wherein said transmitter and receiver is configured to transmit or receive the signal according to the set timing, wherein the timing is determined by a maximum or minimum value of a backoff time, wherein said timing setting unit is configured to set the timing so that the maximum or minimum value of the backoff time is larger when the number of frequency channels for which no interference is detected by said interference detector is larger, and wherein the maximum or minimum value of the backoff time is larger in a case of transmitting or receiving the signal using a frequency channel for which the interference is detected by said interference detector, than in a case of transmitting or receiving the signal using a frequency channel for which no interference is detected by said interference detector.