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Effect of gateway buffer management policies on TCP over ATMperformance

机译:网关缓冲区管理策略对TCP over ATM性能的影响

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In this paper, we examine the effect of the buffer managementnpolicies, used at the IP/ATM gateway, on the end-to-end performance seennby IP traffic when using the ATM ABR service class. The ABR servicenclass uses feedback-based flow control at the ATM layer to dynamicallynpartition bandwidth among active ABR virtual circuits. It is likely thatnthe ABR service will be operated in a manner designed to achieve nearlynloss free operation in the core of the ATM network, causing most of thenbuffering requirements to be pushed to the ingress points of the ATMnnetwork. In our traffic model, an ingress IP/ATM gateway is responsiblenfor setting up ATM virtual circuits and mapping IP packets onto ATMnvirtual circuits. In this model of network transport, the IP/ATMngateways serve as ABR source and destination end-points. Since thenbuffering available at an IP/ATM gateway will typically be smallnrelative to the worst case buffer buildups that can occur due tontransient overloads in the ATM network. Therefore, the buffer managementnpolicy can significantly impact the end to end performance
机译:在本文中,我们检查了IP / ATM网关上使用的缓冲区管理策略对使用ATM ABR服务类时IP流量所看到的端到端性能的影响。 ABR服务类在ATM层使用基于反馈的流控制来动态分配活动ABR虚拟电路之间的带宽。 ABR服务可能会以一种旨在在ATM网络的核心中实现几乎无损操作的方式进行操作,从而导致大多数随后的缓冲需求被推送到ATMn网络的入口点。在我们的流量模型中,入口IP / ATM网关负责建立ATM虚拟电路并将IP数据包映射到ATMnvirtual电路。在此网络传输模型中,IP / ATMn网关用作ABR源和目标端点。从那以后,在IP / ATM网关上可用的缓冲通常相对于最坏情况下的缓冲区累积(由于ATM网络中的瞬时瞬态过载而发生)更小。因此,缓冲区管理策略会严重影响端到端性能

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