Title :
Modeling and regulation of host traffic in ATM networks
Author :
Feng, Fang ; Li, Cen ; Raha, Amitava ; Yu, Shiqian ; Zhao, Wei
Author_Institution :
IBM Corp., Research Triangle Park, NC, USA
Abstract :
For any connection admission control (CAC) algorithm to work correctly and efficiently, accurate information of the traffic flow out of the host systems is required. We develop several approximation approaches for modeling the traffic flows of hard real-time connections. We show that without accurate traffic characterization, the CAC algorithm may do either of the following: (1) admit connections that may cause network congestions which results in violating connection deadline requirements; or (2) pessimistically reject many connections whose QoS can be guaranteed. We propose a traffic approximation model that can characterize the traffic correctly and efficiently, achieving a higher admission probability. From our experimental data we observe that the source traffic from a typical host is bursty. This burstiness may cause congestion within the network. To overcome this problem, we propose and analyze a simple traffic regulation mechanism at the application layer. The performance evaluation data shows that in the regulated system the traffic burstiness is lower and the probability of a connection being admitted is higher than the unregulated system
Keywords :
approximation theory; asynchronous transfer mode; telecommunication congestion control; telecommunication networks; ATM networks; QoS; admission probability; application layer; connection admission control algorithm; connection deadline requirements; experimental data; host systems; host traffic; network congestions; performance evaluation data; real-time connections; source traffic; traffic approximation model; traffic burstiness; traffic characterization; traffic flow; traffic modeling; traffic regulation; Communication system traffic control; Computer networks; Control systems; Delay; Distributed computing; Intelligent networks; Quality of service; Real time systems; Telecommunication traffic; Traffic control;
Conference_Titel :
Local Computer Networks, 1996., Proceedings 21st IEEE Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-8186-7617-5
DOI :
10.1109/LCN.1996.558175