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Multidomain traffic engineering (TE) has the potential not only of guaranteeing the quality of service (QoS) to connections spanning multiple domains but also of effectively utilizing intradomain resources. The hierarchical Optical Internetworking Forum (OIF) External Network-to-Network Interface (E-NNI) control plane platform has emerged as a promising candidate aiming at guaranteeing multidomain...
When dynamic service interconnection requests are managed by a centralized system (e.g., a network management system - NMS), the time required for the connections to be fully operational might be heavily impacted by the policy utilized to serve them. The policies must be devised for mitigating issues that increase this time, such as commercial router irresponsiveness to configuration commands during...
Novel network architectures with distributed service components on both routers and end-systems have been proposed to provide the necessary flexibility in the next-generation Internet. Such architectures allow services to be composed along the data path to satisfy different communication requirements. A major operational challenge in such systems is to determine where to perform the required services...
DTN (delay-tolerant network) is a network model which is abstracted from many examples of networks in recent years. In this network model, a long period of network division happens frequently, so in a given time a period of end-to-end path does not exist. As DTNpsilas this unique topology nature, the traditional network architecture and routing mechanism is no longer applicable. If the information...
The problem of providing quality of service (QoS) in the Internet stems from the original choice of a datagram packet switching service model for the Internet protocol (IP). Since, in principle, each packet can take any path to the destination, it is impossible to provide any absolute guarantees about service. This paper presents a scheme using traffic engineering techniques and implements policy...
The path computation element architecture has been proposed to separate forwarding and routing functionality in small-scale connection-oriented networks, such as MPLS, GMPLS, and ASON. If routing is performed by dedicated units, more sophisticated methods, such as multi-constraint QoS routing, may be implemented than currently widespread practices (i.e. OSPF, IS-IS, BGP, etc.). In this paper, we present...
In this work we investigate the effects of multiple access interference (MAI) and polarization mode dispersion (PMD) in optical code division multiplexing (OCDM) lightpaths. These paths are determined by the data encoding with non-coherent optical orthogonal codes (OOC), using a sequence inversion keying (SIK) optical correlator system. Our results show the impact of MAI effects and PMD constraint...
This paper describes a new path computation model in Multi-protocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks. It introduces a path computation element (PCE), which is functionally separate from label switching routers (LSRs). The Path Computation Element (PCE) is an entity that is capable of computing a network path or route based on a network graph, and applying computational...
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