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Today's backbone communication networks serve a wide range of services with different availability requirements. Each customer has a contract, denoted a Service Level Agreement (SLA) which specifies the availability requirement over the contract period. In the literature, different provisioning strategies to establish connection arrangements capable of meeting a statistical asymptotic availability...
Network measurement provides vital information on the health of managed networks. The collection of network information can be used for several reasons (e.g., accounting or security) depending on the purpose the collected data will be used for. At the University of Twente (UT), an automatic decision process for hybrid networks that relies on collected network information has been investigated. This...
Recent work has revealed a new, relatively simple and possibly cost-effective, approach to achieve combined protection of optical networks against both node and span failures. The resulting network designs use only a single set of p-cycle structures that have the same or only slightly more capacity than a corresponding optimal set of p-cycles for span protection. The new principle is based on a generalization...
To guarantee the success of automatic switched optical network (ASON) management, some important factors, such as state of the network element and environment contexts must be taken into account. This paper explores a mobile agent (MA) approach to support ASON management. The mobile agents are created dynamically according to the demand and dispatched into the whole ASON network, and then integrated...
This paper proposes fault (attack) detection and localization scheme to handle multiple failures (attacks) in the optical network using wavelength-division multiplexing (WDM) technology. This proposed scheme is two-phased scheme containing (a) the detection of faults (attacks) through monitoring devices raising alarms (fault or attack detection) and (b) subsequently the localization of these faults...
We propose a novel method to assess SLA violation risk for service provisioning in a WDM backbone network. Our study reveals the important parameters and advocates comprehensive evaluation (beyond path availability) for service provisioning.
This paper analyses the impact of packet power variations in optical packet ring networks, and demonstrates the need for a distributed power equalisation to guarantee the quality of signal for each packet.
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