The present invention proposes a method of managing a network comprising a set of devices for transmitting a traffic stream using network resources. Each device of the set of devices is individually associated with an expiration time. The expiration time defines a maximum interval of sending a message by a given device among the set of devices for indicating that the given device is connected with the network. The method comprises a step of determining, based on the expiration times of said set of devices, a transmission lease time defining duration of using said network resources.