MESSAGE SYSTEM FOR RELIABLE BULK DATA TRANSFER BASED ON USER DATAGRAM PROTOCOL

摘要

PURPOSE: A communication method based on UDP(User Datagram Protocol) and a method thereof are provided to supply a SAR(Segmentation And Re-assembly) process about an application service message and to provide a retransmission method through a control message exchange. CONSTITUTION: A packet transmitting unit(108) transmits a divided packet, stored in a retransmission packet buffer, to a datagram of a single UDP. A control packet generating unit(110) checks the receiving state of a message when losing a packet. The control packet generating unit generates a control packet. An event processing unit(112) processes a corresponding event when setting a time and time out. A control packet processing unit(114) requests control packet generation to the control packet generating unit if a control packet is transferred from a receiving side.