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Scrambling or information randomization has been effectively used in various applications to prevent the information falling into the hands of rogue attackers. In this paper, we use the idea of spectrum scrambling to proactively randomize the spectrum across multiple fiber cores to improve connections' security, while at the same time effectively defragmenting the spectrum to improve connections'...
Elastic optical networks are prone to spectrum fragmentation, resulting in poor resource utilization and often higher blocking probability. To overcome the spectrum fragmentation, a defragmentation (DF) of the spectrum can be applied by reconfiguring some or all active connections. However, reconfiguration is generally not desirable, as it can interrupt the services of the existing connections. In...
Data randomization or scrambling has been effectively used in various applications to improve the data security. In this paper, we use the idea of data randomization to proactively randomize the spectrum (re)allocation to improve connections' security. As it is well-known that random (re)allocation fragments the spectrum and thus increases blocking in elastic optical networks, we analyze the tradeoff...
We investigate the planning of virtual optical bus (VOB) networks-as a packet-oriented all-optical solution for transport networks-under changing traffic conditions. The planning of a VOB network consists of grouping all edge-to-edge flows in the network into clusters called VOBs, and that has to be done with the objective of minimizing packet collision rate in the optical network. With the dynamic...
We analyze Defragmentation-as-a-Service (DaaS) in elastic optical networks and show that the positive effect of defragmentation depends on the rate at which it is performed, load (or, call arrival rates) and the available resources.
Reconfiguration of connections along frequency axis, — similar to frequency hopping in wireless systems, has been shown to improving security in elastic optical networks (EONs). However, the effect of spectrum reallocation on the connections' blocking and the associated connections' security is still under-explored. In this paper, we examine the effect of reconfiguration of connections on its security...
Generally, an elastic optical network (EON) under a dynamic connection (non-uniform bandwidth) set up and termination scenario leads to spectrum fragmentation, and results in higher blocking probability. To overcome this problem, a defragmentation of the spectrum can be applied by reconfiguring some or all connections in the network. However, reconfiguration can interrupt the services of the existing...
The paper describes an Energy — Efficient Resource Allocation protocol for Wavelength-Routed All-Optical WDM Networks. Protocol selects efficient and low power consumption optimal primary and backup paths. The path selection will be done by Central Management System (CMS). The selection will be by two methods, i.e., the path with less number of free wavelengths will not be considered for selection...
We analyze the performance of virtual optical bus (VOB) networks, which is a packet-oriented all-optical solution for transport networks. VOB groups the flows into clusters and coordinates their packets within each cluster in order to minimize the packet collision in the network. We theoretically study the multiplexing (grouping) of packets of flows in a VOB, by modeling a VOB node, in a VOB network,...
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