Continuing research begun in 2], we investigate problems of reserving capacity in the arcs of a network, subject to the constraint that, on the failure of any one arc, there is enough reserved capacity on the remaining arcs to support a ow of value T from a source s to a destination t. We also impose upper bounds on the amount of capacity we may reserve on the arcs: this alters the nature of th...

The p-Cycle concept is an efficient way to protect the network traffic against failures of network elements. We present the methods and issues related to network planning, management and operations of p-Cycles and highlight the advantages using this concept. Furthermore we report efficiency results of a case-study of the deployment of p-Cycles in Wavelength Divison Multiplex (WDM) networks.

The two main alternatives for achieving high QoS on the public internet are (i) admission control and (ii) capacity overprovisioning. In the study of these alternatives the implicit (and sometimes explicit) message is that ideally, QoS issues should be dealt with by means of sophisticated admission control (AC) algorithms, and only because of their complexity providers fall on the simpler, perh...