1. A method for providing on-demand quality-of-service for a data connection of a user equipment to a third generation partnership project (3GPP) data access network, the method comprising: sending, during an attach procedure of the user equipment to the 3GPP data access network, a message from the user equipment to the 3GPP data access network, the message including an access point name, the access point name including an explicit quality-of-service request being requested by the user equipment for the data connection, the explicit quality-of-service request being formatted in a predefined syntax, the explicit quality-of-service request including a value corresponding to a quality-of-service Class Indicator.