Andrzej Jajszczyk

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The integration of different technologies such as ATM, SDH, and ABSTFWCT WDM in multilayer transport networks raises many questions regarding the coordination of the individual network layers. Especially in the area of network survivability, much can be gained by a better alignment of the healing actions taken by different network layers in case of outages.(More)
The current trend is to integrate a constantly increasing number of services in the same communication network. Some services have very high resilience requirements, while other services have lower ones. This scenario calls for frameworks capable of provisioning for multiple services in a costefficient manner, and already a large number of frameworks has(More)
The following flow-oriented architectures for quality of service assurance in IP networks are surveyed: Integrated Services, Connectionless Approach to QoS guarantees, Dynamic Packet State, Caspian Networks and Anagran, the Feedback and Distribution method, Flow-Based Differentiated Services, Flow-Aware Networking, the Flow-State-Aware transport, and(More)
Many recovery procedures have been developed in recent years. A carrier aiming at guaranteeing an appropriate level of resilience faces the following problem: Which of the proposed recovery procedures should be deployed to maximize revenue? The answer requires many decisions. Some key questions can be formulated as follows: Which procedures can be deployed(More)
The paper gives a tutorial overview of the automatically switched optical network (ASON), concentrating on its control plane. Drivers to automatically switched optical networks are briefly presented. The ASON architecture, based on transport, control, and management planes is discussed. Types of connections supported by ASON are described, including(More)
With the increased role of resilience in modern networks, the existing quality of service is required to be expanded with service availability and maintainability. Recently, studies have shown the strong limitation of the common availability metrics for measuring the user's quality of experience. In this article a joint specification of QoS definitions with(More)