Reactive and proactive routing in labelled optical burst switching networks

Abstract

Optical burst switching architectures without buffering capabilities are sensitive to burst congestion. The existence of a few highly congested links may seriously aggravate the network throughput. Proper network routing may help in congestion reduction. The authors focus on adaptive routing strategies to be applied in labelled OBS networks, that is, with explicit routing paths. In particular, two isolated alternative routing algorithms that aim at network performance improvement because of reactive route selection are studied. Moreover, a nonlinear optimisation method for multi-path source-based routing, which aims at proactive congestion reduction is proposed. Comparative performance results are provided and some implementation issues are discussed.

Adaptive MANET Multipath Routing Algorithm Based on the Simulated Annealing Approach

“…It can alleviate traffic congestion in a specific path. Therefore, multipath routing algorithms can provide the route resilience while ensuring the reliability of data transmission [ 5 , 6 ].…”

“…The proactive congestion reduction (PCR) scheme in [ 5 ] focuses on adaptive routing strategies to help congestion reduction. Based on a nonlinear optimization method for multipath routings, the PCR scheme calculates a traffic splitting vector that determines a near-optimal traffic distribution over routing paths.…”

“…However, these existing schemes have several shortcomings as described in Section 3 . Compared to the PCR scheme and the SMS scheme [ 5 , 6 ], the proposed scheme attains better performance for wireless network managements.…”

“…Section 2 describes the proposed algorithms in detail. In Section 3 , performance evaluation results are presented along with comparisons with the schemes proposed in [ 5 , 6 ]. Finally, in Section 4 , concluding remarks are given and some directions are identified for future work.…”

A load balancing multi-path routing scheme based on effective voids for optical burst switching networks

“…The two schemes cannot dynamically distribute the traffic by network status information, and may lead to high BLP in dynamic network traffic scenario. In [5,6], a nonlinear optimization method is proposed to obtain the optimal splitting proportion of multi-path routes, and the prior information of the network traffic of all edge nodes is required in this method. So its computational complexity is very high.…”