An extension of Integrated Services with active networking for providing quality of service in networks with long-range dependent traffic

Abstract

4lthough today’s network capacity is exponential 1 y increasing, new applications are demanding higher and higher bandwidth. The available bandwidth seems always less than what the new applications require. This tendency results in congested networks and packet loss that we can expect to continue in the foreseeable future. Congestion can be caused by several factors. The most dangerous cause of congestion is the burstiness of the network traffic. Recent results make evident that high-speed network traffic is more bursty and its variability cannot be predicted as assumed previously. It has been shown that network traffic has similar statistical properties on many time scales. Traffic that is bursty on many or all time scales can be described statistically using the notion of longrange dependency. Long-range dependent traffk has observable bursts on all time scales. Reasons, such as traffic burstiness, make providing Quality of Service (QoS) in highspeed networks increasingly important. QoS implies mechanisms to avoid congestion by allocating network resources optimally, rather than continually increasing network capacities. The objective of our paper is to present an extension of a QoS mechanism called Integrated Services ([IntServ) with active networking in networks with long-range dependent traffic.