METHOD FOR ACTIVATING A CONNECTION IN A COMMUNICATIONS SYSTEM, MOBILE STATION, NETWORK ELEMENT AND PACKET FILTER

The invention relates to a method for activating a user data transfer connection (11) between a mobile station (1) and a node (2) of a communications system. For some of the connections (11) the mobile station (1) sends packet filter values (16) to said node (2), the node (2) assigning downlink packets (6) received to a connection (11) of which the filter values (16) match with values included in said packet (6). In order to enable an activation of a connection while at least some filter values required for the connection are not yet available, it is proposed that in such a case, when activating a new connection, the mobile station (1) sends for said connection (11) at least one filter value (16) to said node (2) that does not match with the corresponding value of any possible packet (6). Alternatively, the mobile station (1) transmits a parameter (17) to the node (2) indicating whether the new connection is allowed to be used.