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Quality-of-service mechanisms in IP-over-WDM networks

机译:WDM IP网络中的服务质量机制

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摘要

Classical approaches to QoS provisioning in IP networks are difficult to apply in all-optical networks. This is mainly because there is no optical counterpart to the store-and-forward model that mandates the use of buffers for queuing packets during contention for bandwidth in electronic packet switches. Since plain IP assumes a best effort service model, there is a need to devise mechanisms for QoS provisioning in IP over wavelength-division multiplexing networks. Such mechanisms must consider the physical characteristics and limitations of the optical domain. This article presents a classification and survey of proposals for QoS provisioning and enforcement in IP-over-WDM networks. The different QoS proposals surveyed cover three major optical switching methods: wavelength routing, optical packet switching, and optical burst switching.
机译:IP网络中QoS调配的经典方法很难应用于全光网络。这主要是因为没有与存储转发模型相对应的光学副本,该模型要求在争用电子数据包交换机的带宽期间使用缓冲区对数据包进行排队。由于普通IP假定采用尽力而为的服务模型,因此需要设计一种机制,用于在波分复用网络上的IP中进行QoS设置。这种机制必须考虑光域的物理特性和局限性。本文介绍了IP-WDM网络中QoS设置和实施建议的分类和调查。所调查的不同QoS建议涵盖三种主要的光交换方法:波长路由,光分组交换和光突发交换。

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