Provided is distributed medium access scheduling with implicit ordering (DSIO). The DISO includes the steps of: (a) when any terminal of a plurality of terminals included in a terminal group has data to transmit, promoting the terminal to a transmission data existence layer; (b) when any blue terminal of a plurality of blue terminals included in a blue terminal group has no data to transmit, degrading the blue terminal to a transmission data non-existence layer; and (c) when any red terminal of a plurality of red terminals included in a red terminal group succeeds in intruding between the blue terminals and recognizes whether or not to transmit data without a collision, promoting the red terminal to the blue terminal group.