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The provisioning of services in optical networks requires reliable optical cross-connects. The paper presents advantages of architectures on demand (AoD) for optical cross-connects comparing to non AoD architectures in terms of availability. All conclusions come from analytical calculations verified by path set enumeration and Abraham's algorithm.
Due to the large transmission speeds and enormous volume of transferred data, network reliability performance and cost-efficiency are among the key concerns in optical network design. Reducing the number of used optical components with higher failure probability within nodes represents a promising approach for achieving reliable and cost-effective optical(More)
In optical networks a group of logically distinct links can unintentionally share a physical resource (e.g, a cable or a duct). Such a group, called shared risk link group (SRLG), introduces a situation where a single failure of common resource can cause multiple failures. Failure of common resource usually occurs due to physical force (e.g, digging or(More)
Optical backbone networks are carrying enormous amount of traffic and therefore, network reliability performance is extremely important to minimize the service interruption time and loss of data. Besides, increasing energy consumption of the ICT sector makes network energy efficiency gain a lot of attention. Reducing the usage of components in the network(More)
The application of all-optical switching fabrics will be an important breakthrough in avoiding capacity bottleneck caused by electronic-switching in optical networks. All-optical domain of achieved network is characterised by absence of optical-electrical-optical conversions. In this paper, the-state-of-the-art of optical switching fabrics used in optical(More)
The paper demonstrates the concept of optical networks with nodes implemented by the architecture on demand (AoD) and proposes a procedure for finding out possible benefits of AoD application, related to node and network availability. AoD node structure enables efficient failure management by creating a set of redundant components, which can be used for(More)
The study focuses on optimization of optical networks based on function programmable ROADMs implemented by Architecture on Demand (AoD) under a multi-hour traffic scenario. The objective is to minimize the cost and energy consumption by reducing the number of active modules inside the nodes, and to investigate the impact of network reconfiguration frequency(More)
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