Methods and systems that use information about data packets to determine an order for sending the data packets

[Subject] The method (400) and system (310, 320) for carrying out streaming of the media data are offered. [Solution means] The media data which the method concerning the present invention is the method (400) of carrying out streaming of the media data, and contains two or more data packets is accessed (410), Are accessing the 1st information that changes a fixed quantity of characteristics of each data packet in two or more above-mentioned data packets (420), and using the 1st information of the above (430), and by it, It includes using the 1st information of the above that determines the transmission order of the above-mentioned data packet in a network (430). [Selection figure] Fig. 3