PACKET TRAFFIC DYNAMICS NEAR ONSET OF CONGESTION IN DATA COMMUNICATION NETWORK MODEL
Dedicated to Professor Peter Talkner on the occasion of his 60-th birthday. The dominant technology of data communication networks is the Packet Switching Network (PSN). It is a complex technology organized as various hierarchical layers according to the International Standard Organization (ISO) Open Systems Interconnect (OSI) Reference Model. The Network Layer of the ISO OSI Reference Model is responsible for delivering packets from their sources to their destinations and for dealing with congestion if it arises in a network. Thus, we focus on this layer and present an abstraction of the Network Layer of the ISO OSI Reference Model. Using this abstraction we investigate how onset of traffic congestion is aﬀected for various routing algorithms by changes in network connection topology. We study how aggregate measures of network performance depend on network connection topology and routing. We explore packets traﬃc spatio-temporal dynamics near the phase transition point from free ﬂow to congestion for various network connection topologies and routing algorithms. We consider static and adaptive routings. We present selected simulation results.