PACKET COMMUNICATION SYSTEM

PURPOSE:To reproduce an original communication text by composing/decomposing a packet based on the threshold value theory that it is possible to reproduce the original information by using only optional K-set of information divisions among N-set of information divisions in composing/decomposing plural packets without using a retransmission procedure even if a prescribed number of packet is missing in a network. CONSTITUTION:The series of communication text 8 transmitted from a general terminal device 1 is coded dividedly and becomes divided transmission texts 10. When the number of divisions is 6 in this case, the transmission text 10 is composed into packets 12, which are inputted to a packet exchange 5 and carried to object incoming device after being relayed among plural number of the packet exchanges 5. Thus, a packet, e.g., 12d arrived at the object device might be missing depending on the passing route. For example, no packet 12d exists in a received text 11 received dividedly, but the entirely the same communication text 9 as the communication text 8 prepared by a sender is recovered from the five packet information divisions deficient of one out of the 6 divisions according to the K, N threshold theory (in this example, K=5 and N=6). Then the retransmission request to the missing packet is not required and the sequence control itself is not required.