Telephone networks can be well modeled using an exponential distribution because they show a relatively homogeneous and predictable behavior over large time scales. In contrast to these circuit-switched networks the Internet has very diierent characteristics. At rst people tried to create simulations of this global network with the same tools that were used before, but soon realized that its tr...

We propose a systematic method to determine the lower bound for internal buffering of practical CIOQ switching systems. To this end we introduce a deterministic traffic scenario that stresses the global stability of finite output queues. We demonstrate its usefulness by dimensioning the buffer capacity of the CIOQ under such traffic patterns. Compliance with this property maximizes the performa...

QPSX [1,16,21], a Queued Packet and Synchronous circuit eXchange, is a Metropolitan Area Network (MAN) proposed standard with IEEE 802.6. It is developed by QPSX Communications Pty. Ltd. and sponsored by Telecom Australia. QPSX is · a distributed broad-band, movable boundary [10] type communications switch, that provides integrated packet and circuit switching. Its capacity is dynamically alloc...

This paper deals with the insertion of a dedicated path protection strategy in the design of a novel optical network structure, called PetaWeb, that can reach a total capacity of several Pb/s (10 bit/s). Prior studies of the same authors have tackled the optimization of a PetaWeb network architecture with a regular composite-star topology and with a quasi-regular topology. In this paper, a prot...

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With increasing security threats in internet environments, we may therefore want to establish a secure mechanism for data transmissions on each network. This paper presents a mechanism for establishing secure switching local area networks (LANs) by using intelligent switching hubs. Then we can achieve secure internet environments by means of the proposed switching LANs and firewalls. The propos...

The path recovery in MPLS is the technique to reroute traffic around a failure or congestion in a LSP. Currently, there are two kinds of model for path recovery: rerouting and protection switching. The existing schemes based on rerouting model have the disadvantage of more difficulty in handling node failures or concurrent node faults. Similarly, the existing schemes based on protection switchi...

Wireless LANs are becoming commonplace because of their ease in providing mobile communication. As use of IEEE 802.11 continues to expand, support for voice will Preprint submitted to Elsevier Science 2 December 2004 become a desirable feature. Supporting voice conversations over a packet network is more challenging than over current circuit switched wired networks. These challenges are particu...