Abstract: A method for connecting peer-to-peer applications over a wireless LAN comprises the steps of: a peer terminal extracting application information from the peer-to-peer applications; the peer terminal generating service start information from the extracted application information; during a predetermined waiting time, the peer terminal determining whether or not at least one other peer terminal corresponding to the service start information exists; and setting the terminal having the highest leader pseudo-measurement as a leader terminal and setting the other terminals as member terminals based on a leader pseudo-measurement included in the service start information and a leader pseudo-measurement received from the or each other peer terminal when at least one other peer terminal corresponding to the service start information exists. Therefore, the present invention has the effect of being able to automatically and quickly connect the peer-to-peer applications over the wireless LAN.

Abstract: Disclosed is a system for providing mobile content which improves the quality of the advertising and promotional content service, and which also improves the efficiency of advertising and promotion. The suggested system includes: a code creating means for creating original content information and a code corresponding to content to be provided; and a terminal for storing the content and the original content information, obtaining at least one content providing means and code which enable the transmission of the corresponding content in response to a received content request message, extracting original content information corresponding to the obtained code and then broadcasting a content request message including the extracted original content information, and receiving corresponding content from at least one content providing means or at least one other terminal.

Abstract: A user interface method in a multimedia playing device having a touch screen is provided. The user interface method includes displaying, while playing a multimedia file, at least one sound source object in a first area of the touch screen, identifying, if an input event is generated for the sound source object, a type of the input event, changing a form of the displayed sound source object according to the type of the input event, and controlling the play of the multimedia file. Accordingly, while playing a multimedia file, an attribute of a playing multimedia file is displayed in a touch screen of a multimedia playing device, and the attribute of the playing multimedia file may easily be changed by touching and dragging the touch screen.