Simulation Study of WWW Traffic over a DQDB Network.
Halid Hrasnica, Theo H. J. Muller, Ralf Lehnert · 1999
We present a simulation study of WWW traffic over a realistic DQDB network running the TCP/IP protocol stack. All network and protocol elements have been implemented in detail. A large scale DQDB network with 12 nodes and 24 access units is studied. QoS parameters of 552 TCP connections between end users are analyzed. The average frame length in our traffic source model has been chosen according to the characteristics of WWW traffic. We have analyzed two network models with different sizes of the buffers in the access unit. The influence of the buffer size on QoS parameters and transmission performance has been examined. The worst case connections in the DQDB network have been also studied. Simulation results for throughput of the DQDB busses and the loss of IP packets in the DQDB network are given. TCP throughput and transmission times at two protocol levels are measured. Our results show a good utilization of the DQDB network capacity. The peak transmission delays in higher network l...