The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for uploading data by a station (STA) in a mobile communication system supporting a plurality of radio access interfaces (RAIs) is provided. The method includes, upon detecting that there is content to be uploaded, determining whether a first RAI among the plurality of RAIs is available, and when the first RAI is available, transmitting a header message including information related to the content and a body message including at least one of a plurality of segments which are generated based on the content to a proxy server through the first RAI to upload the at least one of the plurality of segments to an original server.