System for decentralized control of wireless local area networks, made up by a set of access points that provide connection service to a set of stations, wherein each access point comprises: - a decentralized controller, - a physical layer driver, - a QoS control unit, - a physical layer measurement unit in charge of monitoring physical layer parameters, - a physical layer control unit in charge of configuring the physical layer based on the commands sent by the decentralized controller; characterized in that the decentralized controllers of the various access points belonging to the wireless network are configured to, during the start-up process of the wireless network or when an access point is added to the wireless network, carry out an automatic transmission channel selection for each access point in the wireless network, wherein: each access point in the local area wireless network is configured to sequentially (S7.1): scan the channels to detect beacons transmitted by other access points; and transmit (M5, M6), to the rest of the access points of the local area wireless network, network structure information containing the access points whose transmitted beacons are received, the power with which the beacons are received and a list of preferred channels containing the channels on which the access point can operate in order of preference; each access point in the local area wireless network is configured to locally compute (S7.2) the channel selection for all of the access points of the local area wireless network, wherein said channel selection is carried out based on the network structure information gathered and shared by each access point and using the criteria to minimize interference between the access points of the local area wireless network and minimize interference with other networks or wireless devices external to the network; each access point is configured to assign the transmission channel of the access point to the corresponding computed channel. - a decentralized controller, - a physical layer driver, - a QoS control unit, - a physical layer measurement unit in charge of monitoring physical layer parameters, - a physical layer control unit in charge of configuring the physical layer based on the commands sent by the decentralized controller; each access point in the local area wireless network is configured to sequentially (S7.1): scan the channels to detect beacons transmitted by other access points; and transmit (M5, M6), to the rest of the access points of the local area wireless network, network structure information containing the access points whose transmitted beacons are received, the power with which the beacons are received and a list of preferred channels containing the channels on which the access point can operate in order of preference; scan the channels to detect beacons transmitted by other access points; and transmit (M5, M6), to the rest of the access points of the local area wireless network, network structure information containing the access points whose transmitted beacons are received, the power with which the beacons are received and a list of preferred channels containing the channels on which the access point can operate in order of preference; each access point in the local area wireless network is configured to locally compute (S7.2) the channel selection for all of the access points of the local area wireless network, wherein said channel selection is carried out based on the network structure information gathered and shared by each access point and using the criteria to minimize interference between the access points of the local area wireless network and minimize interference with other networks or wireless devices external to the network; each access point is configured to assign the transmission channel of the access point to the corresponding computed channel.