Method and user equipment for uplink traffic mapping

A method in a User Equipment, UE for handling transmission of an uplink data packet to a Packet Data Network, PDN, wherein the UE is configured to communicate with the PDN via a gateway node using bearers between the UE and the gateway node, the method comprising:

• determining if there is any uplink packet filter assigned to at least one bearer that matches the uplink data packet to be transmitted to the PDN;
• when there is no uplink packet filter that matches the uplink data packet, determining if there is any uplink packet filter on a default bearer;
• and
• when there is no uplink packet filter that matches the uplink data packet and when there is no uplink packet filter on the default bearer, determining that the uplink data packet should be transmitted to the PDN using the default bearer, wherein the default bearer has not been assigned any uplink packet filter.