Visible to the public A Restricted Intermediate Node Buffering-Based Contention Control Scheme for OBS Networks

TitleA Restricted Intermediate Node Buffering-Based Contention Control Scheme for OBS Networks
Publication TypeConference Paper
Year of Publication2019
AuthorsNleya, B., Khumalo, P., Mutsvangwa, A.
Conference Name2019 International Conference on Advances in Big Data, Computing and Data Communication Systems (icABCD)
Date Publishedaug
Keywordsbackbone all-optical networks, Buffer storage, contention avoidance, contention resolution, coupled congestion control, data burst contention, individual wavelength contention performances, Intermediate Buffering, key network performance metrics, lightpath connections, lightpath connections paths, load balancing, network diameter, network performance, network radius, OBS networks, Optical buffering, optical burst switching, Optical Burst Switching (OBS), Optical fiber networks, optical fibre networks, Optical wavelength conversion, partial intermediate buffering provisioning, pubcrawl, QoS, quality of service, quality of service (QoS), resilience, Resiliency, resolution measures, restricted intermediate node buffering-based contention control scheme, restricted intermediate node buffering-based routing and wavelength assignment scheme, RI-RWA scheme, Routing, Scalability, Signal resolution, standard one-way resource signaling, Switches, telecommunication congestion control, telecommunication network routing, telecommunication signalling, telecommunication traffic, wavelength assignment
AbstractOptical burst switching (OBS) is a candidate switching paradigm for future backbone all-optical networks. However, data burst contention can be a major problem especially as the number of lightpath connections as well as the overall network radius increases. Furthermore, the absence of or limited buffering provision in core nodes, coupled with the standard one-way resources signaling aggravate contention occurrences resulting in some of the contending bursts being discarded as a consequence. Contention avoidance as well as resolution measures can be applied in such networks in order to resolve any contention issues. In that way, the offered quality of service (QoS) as well as the network performance will remain consistent and reliable. In particular, to maintain the cost effectiveness of OBS deployment, restricted intermediate buffering can be implemented to buffer contending bursts that have already traversed much of the network on their way to the intended destination. Hence in this paper we propose and analyze a restricted intermediate Node Buffering-based routing and wavelength assignment scheme (RI-RWA) scheme to address contention occurrences as well as prevent deletion of contending bursts. The scheme primarily prioritizes the selection of primary as well as deflection paths for establishing lightpath connections paths as a function of individual wavelength contention performances. It further facilitates and allows partial intermediate buffering provisioning for any data bursts that encounter contention after having already propagated more than half the network's diameter. We evaluate the scheme's performance by simulation and obtained results show that the scheme indeed does improve on key network performance metrics such as fairness, load balancing as well as throughput.
Citation Keynleya_restricted_2019