Fundamental consideration on heterogeneous packet switching involving message communications application

Abstract Recently, the packet switching network which deals with relatively short data packets has been developed for the conversation‐type communication between the periphery and computer. However, in the message communication in which files and picture information are exchanged, the packet switching network must deal with long packets. The packet switching network which deals with long and short packets is called the heterogeneous packet switching network. In this paper, the optimum packet size for the message communication is discussed from the viewpoint of communication cost. Further, the segregated‐type and integrated‐type heterogeneous packet switching systems, the buffer memory and packet transfer delay time, are evaluated and compared.