A method to optimize the communication on a channel between an access point and at least one client device, said channel being characterized by a center frequency and a bandwidth, comprises: establishing a connection on a first channel according to a first center frequency and a first bandwidth; exchanging data through this first channel between the access point and the client device; monitoring a first interference level on the first channel; the access point, while the data are exchanged, executes: informing the client device to switch to a second channel having a different center frequency and/or a different bandwidth; determining a second interference level on the second channel; comparing the first interference level with the second interference level; deciding to switch back or keep the second channel based on the comparison.