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首页> 外文会议>International Conference on Advances in Big Data, Computing and Data Communication Systems >A Restricted Intermediate Node Buffering-Based Contention Control Scheme for OBS Networks
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A Restricted Intermediate Node Buffering-Based Contention Control Scheme for OBS Networks

机译：OBS网络基于受限中间节点缓冲的竞争控制方案

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Optical 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.
机译：光突发交换（OBS）是未来骨干全光网络的候选交换范例。但是，数据突发争用可能是一个主要问题，尤其是随着光路径连接的数量以及整个网络半径的增加。此外，核心节点中缺少或有限的缓冲提供，再加上标准的单向资源信令，加剧了争用的发生，结果导致一些竞争性突发被丢弃。可以在此类网络中应用避免竞争以及解决措施，以解决任何竞争问题。这样，所提供的服务质量（QoS）以及网络性能将保持一致和可靠。特别是，为了保持OBS部署的成本效益，可以实施受限的中间缓冲来缓冲竞争的突发，这些突发在到达目标目的地的过程中已经遍历了大部分网络。因此，在本文中，我们提出并分析了一种基于受限中间节点缓冲的路由和波长分配方案（RI-RWA）方案，以解决争用情况并防止竞争性突发的删除。该方案主要根据用于各个波长竞争性能的功能，优先选择用于建立光路连接路径的主要路径和偏转路径的选择。它进一步促进并允许对已经传播了超过网络直径一半的数据后遇到竞争的任何数据突发进行部分中间缓冲配置。我们通过仿真评估了该方案的性能，获得的结果表明，该方案确实确实在关键网络性能指标（如公平性，负载平衡以及吞吐量）上有所提高。

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