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首页> 外文期刊>IEICE Transactions on Communications >An Adaptive Loss-Aware Flow Control Scheme for Delay-Sensitive Applications in OBS Networks
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An Adaptive Loss-Aware Flow Control Scheme for Delay-Sensitive Applications in OBS Networks

机译：OBS网络中延迟敏感应用的自适应损耗感知流控制方案

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摘要

Optical Burst Switching (OBS) is one of the most promising switching technologies for next generation optical networks. As delay-sensitive applications such as Voice-over-IP (VoIP) have recently become popular, OBS networks should guarantee stringent Quality of Service (QoS) requirements for such applications. Thus, this paper proposes an Adaptive Loss-aware Flow Control (ALFC) scheme, which adaptively decides on the burst offset time based on loss-rate information delivered from core nodes for assigning a high priority to delay-sensitive application traffic. The proposed ALFC scheme also controls the upper-bounds of the factors inducing delay and jitter for guaranteeing the delay and jitter requirements of delay-sensitive application traffic. Moreover, a piggybacking method used in the proposed scheme accelerates the guarantee of the loss, delay, and jitter requirements because the response time for flow control can be extremely reduced up to a quarter of the Round Trip Time (RTT) on average while minimizing the signaling overhead. Simulation results show that our mechanism can guarantee a 10~(-3) loss-rate under any traffic load while offering satisfactory levels of delay and jitter for delay-sensitive applications.
机译：光突发交换（OBS）是下一代光网络中最有前途的交换技术之一。随着诸如IP语音（VoIP）等对延迟敏感的应用程序的普及，OBS网络应保证此类应用程序对服务质量（QoS）的严格要求。因此，本文提出了一种自适应丢失感知流控制（ALFC）方案，该方案基于从核心节点传递的丢失率信息自适应地确定突发偏移时间，以便为对延迟敏感的应用流量分配高优先级。所提出的ALFC方案还控制了引起延迟和抖动的因素的上限，以保证对延迟敏感的应用业务的延迟和抖动要求。此外，由于可将流量控制的响应时间平均缩短至平均往返时间（RTT）的四分之一，而同时又将最小化，因此建议方案中使用的piggy带方法可加快对丢失，延迟和抖动要求的保证。信令开销。仿真结果表明，我们的机制可以在任何流量负载下保证10〜（-3）的丢失率，同时为对延迟敏感的应用提供令人满意的延迟和抖动水平。

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