An OLED and a method of fabricating the same are provided, in which, when a reflective layer pattern is formed, a thin layer for a pixel electrode is opened at an edge of an emission region to form the pixel electrode without additional photolithography and etching processes by forming an undercut under the edge of the reflective layer pattern, i. The method includes each initiator sending a frame to all other initiators in the loop network identifying any ports which should not be used. A temporal distance that includes the physical distance between the two points in proportion to cloud speed is determined.