Opportunity spectrum access method under limited energy condition

The invention discloses an opportunity spectrum access method under the condition of limited energy. The method comprises the following steps: establishing a perception access energy consumption channel model; checking residual energy of the cognitive user, and determining a channel set to be perceived; sensing the channels to obtain a sensing idle channel set; enabling the secondary user to access all channels which are perceived to be idle; and enabling the secondary user to update the channel statistical information and the energy information. The perceptual access energy consumption channel model established by the method is closer to reality, the problem is abstracted into an energy-limited multi-arm bandit model based on sequential decision and statistical learning theories, and a channel perceptual access strategy is provided by utilizing a knapsack problem in the optimization problem. Besides, the algorithm designed by the invention has a nonlinear relationship with the magnitude of the user energy in