The method comprising allowing a wireless broadband connection between at least one wireless device including a tethering function with at least one wired broadband device, and using said tethering function for sharing said wireless broadband connection through aggregating a bandwidth of said wired broadband device to said at least one wireless device, wherein a segmentation of application packets of information, at the layer of the application protocol enabling said connection, namely the application layer, is performed into sub packets that will be transmitted to said at least one wireless device, using a proxy including a set of application handler modules handling packets of information for said connection.The system of the invention is adapted to implement the method of the invention.