Takeshi Aimoto

Large scale enterprise ATM node with per-VC traffic control

Abstract On the backbone nodes of enterprise networks which handle data and voice traffic, complicated Quality of Service (QoS) capability, transmission efficiency, and high reliability are required. ATM technology satisfies those requirements. We have developed a large scale enterprise ATM node based on the shared buffer switch architecture. In the node, per-VC traffic control functions are implemented at low cost using centralized control of buffer write and read. In this paper, we explain the detail of the per-VC traffic control functions and show the performance results of ABR control using the node.

Evaluation of a Hierarchical Shaper as a Policy Execution Point

The Next Generation Network (NGN) is expected to become the most important infrastructure for various services used for e-Business such as telephone services, Internet services and new generation broadcasting services. It is supposed to be integrated into all IP network. To satisfy various Quality of Service (QoS) requirements of these services not only for each service but also for every user, we have developed a hierarchical shaper. The shaper has been implemented in a QoS aware gigabit router environment. Although this shaper has to be evaluated to manage actual traffic, the influence of various network conditions on bandwidth control has not been studied thoroughly. This paper reports some experimental results and clarifies the characteristics of the shaper.