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Flexible simulators for oBS network architectures
2008 10th Anniversary International Conference on Transparent Optical Networks, 2008Since the OBS paradigm has become a potential candidate to cope with the needs of the future all optical networks, it has really caught the attention from both academia and industry worldwide. In this direction, OBS networks have been investigated under many different scenarios comprising numerous architectures and strategies.
Oscar Pedrola +5 more
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Traffic Characteristics in OBS Networks
2009Modeling and analysis of the OBS networks is a challenging task due to the unacknowledged switching used and the lack of optical buffers at the core nodes. Further, due to the aggregation of packets into bursts at the ingress nodes, the characteristics of the IP traffic are changed inside the OBS network.
T. Venkatesh, C. Siva Ram Murthy
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Enhanced congestion management in OBS networks
2017 IEEE AFRICON, 2017Due to the bufferless nature of optical burst switched (OBS) networks, contention/congestion in the core network can quickly lead to degradation in overall network performance at moderate to high traffic levels due to heavy burst losses. Several approaches have been explored to address this problem, notably measures that would minimize burstification ...
Masimba Gomba, Bakhe Nleya
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Dimensioning of combined OBS/OCS networks
2008 5th International Conference on Broadband Communications, Networks and Systems, 2008To cope with ever-increasing traffic demands in transport networks, all-optical switching is currently perceived as a potential solution to remove bottlenecks caused by optoelectronic conversions. An effective realization of this concept must support a wide range of traffic patterns, while remaining feasible to construct and deploy both in an ...
M. De Leenheer +4 more
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Contention Resolution in OBS Networks
2009OBS networks using the JET/JIT reservation mechanism, which is a one-way and unacknowledged reservation mechanism, provide connectionless switching. Due to this feature, the bursts may contend with one another at the core nodes. Contention among two bursts occurs due to the overlap of two or more bursts (in time) that arrive simultaneously on two ...
T. Venkatesh, C. Siva Ram Murthy
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Proactive contention avoidance in OBS networks
Journal of Lightwave Technology, 2004We propose to use BORA (burst overlap reduction algorithm) to schedule locally assembled bursts so as to proactively avoid burst contention at downstream nodes in optical burst switched (OBS) networks.
J. Li, C. Qiao
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Blocking Probability in OBS Networks
2009Computing the blocking probability of bursts at the core nodes in an OBS network is important for many reasons. First, it helps to understand the loss process of bursts and provide exact analytical expression for the loss rate of bursts at the core nodes.
T. Venkatesh, C. Siva Ram Murthy
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OBS ring network with tunable transceivers
SPIE Proceedings, 2005OBS is more flexible and has higher bandwidth utilization than OCS; on the other hand, it is more feasible than OPS. OBS is the ideal switching technology at present. In this paper, we study OBS ring network with tunable transceivers. To reduce the high cost per node of an OBS ring network, a possible solution is to use tunable transceivers at the ...
Yinghui Qiu, Yuefeng Ji, Daxiong Xu
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Control-Plane Congestion in OBS Networks
2006 3rd International Conference on Broadband Communications, Networks and Systems, 2006In this study, we examine control-plane throughput in optical burst switching (OBS) networks with electronic header processing. In a large-scale OBS network, headers arrive to the burst scheduler at a very high rate. This can potentially cause overloading of the core-node control-processor and lead to data loss if headers are not processed in a timely ...
Neil Barakat, Thomas E. Darcie
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Wavelength assignment algorithms in OBS networks
Optik, 2012Abstract The wavelength assignment algorithm is a method to improve the performance in respect of blocking probability and to provide cost effective communication system. In this paper, we have developed a simple mathematical model which is used for the calculation of blocking probability of an OBS network.
Hardeep Singh +3 more
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