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An Efficient Switch Design for Scheduling Real-Time Multicast Traffic

机译:调度实时多播流量的高效交换机设计

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摘要

In this paper we put forth a switch design in terms of architecture and service discipline for real-time multicast traffic in packet switching networks. A parallel switching architecture called POQ (parallel output-queued) is employed, which take the advantages of both OQ (output-queued) and IQ (input-queued) switch architectures, i.e., non-blocking and low speedup of switch buffer. Basing on the POQ architecture we propose a hierarchical service discipline called H-EDF-RR (hierarchical earliest-deadline-first round-robin), which intends to simultaneously schedule both unicast and multicast traffic composed of fixed-length cells with guaranteed performances. Analyses show that this design can provide tight delay bounds and buffer requirements, and has computational complexity of O(1). These properties make the proposed switch design well suitable in real-time distributed systems.
机译:在本文中,我们从体系结构和服务规范的角度针对分组交换网络中的实时多播流量提出了一种交换机设计。采用了一种称为POQ(并行输出排队)的并行交换架构,该架构利用了OQ(输出排队)和IQ(输入排队)交换架构的优势,即无阻塞且交换缓冲器的低速提速。在POQ体系结构的基础上,我们提出了一种称为H-EDF-RR(分层的最早-截止时间-优先循环)的分层服务规则,该规则旨在同时调度由固定长度的小区组成的单播和多播流量,并保证性能。分析表明,该设计可以提供严格的延迟范围和缓冲区要求,并且具有O(1)的计算复杂度。这些特性使所提出的开关设计非常适合于实时分布式系统。

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