| Multimedia traffic in high speed networks is bursty and correlated. Without proper traffic control mechanisms, switches in the network are likely to be congested due to the burstiness, and once congestion occurs, it is likely to stay long due to the correlation. In this dissertation, such statistical properties of multimedia traffic and the importance of so-called low-frequency statistics of traffic in controlling multimedia traffic are investigated. Based on such investigation, we propose or re-examine several traffic control mechanisms ranging from connection-level control such as access rate control and admission control to network-level control such as routing/rerouting and link capacity allocation.;First, we study the performance trade-off of access rate control in correlated traffic environment. By introducing a spectral representation of input correlation, we examine the interrelationship between access control queueing and network queueing as affected by degrees of control in response to a broad range of input correlation. Interesting observations are made between control performance and low-frequency input statistics. Second, based on so-called per-session (... |
