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OCDM networks have a cycle attack caused by MAI propagation and disrupted network services. We describe a path establishment method constructed autonomously by logical tree topology to prevent this problem.
The use of inverse-multiplexing with diverse-path routing techniques in transport networks is expected to satisfy the traffic demands at the expense of lower capacity requirements. However, when the traffic between two nodes is routed over multiple paths, the different flows have different arrival times at the destination node. In order to compensate for this difference, known as differential delay,...
Optical Packet Switching (OPS) technologies are among the most promising solutions for next generation Internet. In this paper, we address quality of service (QoS) and fairness issues in a novel OPS ring architecture with a slotted synchronous transmission mode. The basic MAC protocol in the studied architecture is similar to the CSMA/CA mechanism. Using this mechanism, each node in the network may...
The emerging vehicular applications such as active safety, infotainment, interactive games, and wireless Internet access might dictate very high reliability and availability in future radio over fiber networks. This paper provides an integrated analysis of availability of the optical fiber network and the wireless network, in future radio over fiber systems. We present an integrated comparative analysis...
Optical burst switching (OBS) is a promising technology for future optical networks. Due to its less complicated implementation using current optical and electrical components, OBS is seen as the first step towards the future optical packet switching (OPS). Regarding network topologies, the ring is extensively used on current metropolitan environments, and this does not seem it will change in the...
Passive optical networks (PONs) represent a step forward in "first mile" networks; indeed, by using optical technologies, PONs can transfer a large amount of data, and by being completely passive, they reduce management costs and failure probabilities. Access network is logically a point-to-multipoint network and the tree topology emerged as the winning solution; however, it naturally lacks...
Although many multicast routing algorithms have been proposed in order to reduce the total cost in WDM optical networks, the link stress and delay are two parameters which are not always taken into consideration. This paper proposes a novel wavelength routing algorithm, which tries to avoid the multicast incapable branching nodes (MIB, branching nodes without splitting capability) to diminish the...
This paper addresses the problem of burst assembly in OBS-GRID networks and particularly the TCP throughput maximization problem for large file sizes. For that purpose, a novel adaptive size-based approach is proposed, following some probabilistic methods and considering the effect of the burstification process in the overall transport system. The scheme has been evaluated in a high capacity GRID...
Multipath provisioning is a key feature of next-generation SONET/SDH networks (which can be used on top of optical WDM) and they can support virtual concatenation (VCAT); thus, multipath provisioning can significantly outperform single-path provisioning in resource efficiency, service resilience, and flexibility. However, in multipath provisioning, differential delay is an important constraint which...
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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