A mobile communication device operating as a Mobile Terminal (MT) with multiple processor logics is provided. In the mobile communication device, a first processor logic is configured for sending an Activate PDP (Packet Data Protocol) Context Request message to a service network, a second processor logic is configured for receiving an Activate PDP Context Accept message indicating a PDP address from the service network, and a third processor logic is configured for indicating an interface identifier and a prefix obtained from the PDP address to a Terminal Equipment (TE), so that the TE constructs an IPv6 address based on the prefix and interface identifier.