Generic access to the iu interface

A method for managing a plurality of transport channels package, PTCs, in a communication system (100) comprising (i) a first communication system (130) comprising a core network (165) and an access network licensed radio (185), and (ii) a second wireless communication system generic access comprising a network controller (120, 5110) for communicatively associating the second wireless communication system generic access to core network, comprising the method : to establish a secure tunnel between a user equipment and network driver in tercambiar safely a plurality of signaling messages between the user equipment and network controller, wherein the method further includes the steps of: on the computer user (5105), activating a separate PTC between the user equipment (5105) and the network controller (5110) for each of a plurality of active contexts protocol packet data, PDP, being activated each PTC by a set of signaling messages exchanged between the user equipment and the network driver and starting a PTC timer dedicated to a particular PTC for a particular PDP context whenever a data packet related to that PDP in particular is sent or received by the user equipment, and indicating the expiration of the timer PTC the PTC must be disabled.