FEC-based burst loss recovery for multiple-bursts transmission in optical burst switching networks

Random contentions occur in optical burstswitched (OBS) networks because of one-way signaling and lack of optical buffers. These contentions can occur at low loads and are not necessarily an indication of congestion. The loss caused by them, however, causes TCP at the transport layer to reduce its send rate drastically, which is unnecessary and reduces overall performance. In this paper, we propose forward segment redundancy (FSR), a proactive technique to prevent data loss during random contentions in the optical core. With FSR, redundant TCP segments are appended to each burst at the edge and redundant burst segmentation is implemented in the core, so that when a contention occurs, primarily redundant data are dropped. We develop an analytical throughput model for TCP over OBS with FSR and perform extensive simulations. FSR is found to improve TCP's performance by an order of magnitude at high loads and by over two times at lower loads.

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“…where E[W x ] is defined in (5). If the contention probability, p c , is very small, the throughput can be estimated as:…”

Section: Analytical Tcp Throughput Modelmentioning

confidence: 99%

“…A number of mechanisms have been proposed to deal with these random contentions, including fiber delay lines (FDLs), wavelength conversion, deflection routing, burst segmentation [4], retransmission [2], and forward error correction (FEC) [5]. There have also been techniques that focus on burst assembly to reduce contentions in the core [6].…”

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confidence: 99%

Improving TCP performance over optical burst-switched (OBS) networks using forward segment redundancy

2011

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“…The time for processing a control packet on a core router (tP10C in Fig. 2) is 1 [ms] [5]. In simulation, we do not perform wavelength conversion and buffering with FDL (Fiber Delay Line).…”

Section: B Problem In Offset-time-based Qosmentioning

confidence: 99%

A Burst Assembly Method for Decreasing End-to-end Packet Delays in Optical Burst Switching Networks

Fukushima

Yokohira

Noine

2006

2006 International Conference on Communication Technology

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Although the offset-time-based scheme can differentiate packet/burst loss rate according to their QoS levels in optical burst switching networks, it increases end-to-end packet delays of packets in a burst with higher QoS level. This is because it increases offset time of bursts in proportional to their QoS levels. In this paper, we propose a burst assembly method that decreases end-to-end packet delays. Our proposed method includes packets that arrive during the offset time into the currently assembled bursts while the conventional method includes them into the burst assembled next time. Simulation results show that our method offers more than 21% delay reduction for bursts with the highest QoS level.

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“…The importance of MBT is referred to in [16]. They consider grid computing and compact disk (CD) digital versatile disk (DVD) delivery as desired applications over OBS networks, and study an MBT scheme with forward error correction (FEC) that has been applied to recover burst loss [17,18].…”

Section: B Mbt On Jetmentioning

confidence: 99%

QoS differentiation scheme with multiple burst transmission and virtual resource reservation for optical burst switching networks

Arakawa

Yamanaka

2007

J. Opt. Netw.

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͑Doc. ID 82050͒ We propose what we believe to be a new scheme to provide basic quality of service (QoS) in optical burst switching networks. Our proposal consists of multiple burst transmission (MBT) and virtual resource reservation (VRR). With MBT, consecutive bursts headed to the same destination are serially transmitted, and, at the transmission of high-priority bursts, the wavelength resource reserved by the head burst is kept reserving for the following bursts. We call it VRR. Computer simulations show that our proposal offers a larger differentiation of burst loss than the conventional offset-based QoS differentiation scheme. Also, it can improve the burst loss rate of both high-priority and low-priority bursts. Moreover, it can minimize the burst loss rate of highpriority bursts even when the high-priority traffic occupies a large percentage of the network traffic. The proposed scheme can be applied to the future multiservice optical network architecture.

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FEC-based burst loss recovery for multiple-bursts transmission in optical burst switching networks

Cited by 7 publications

References 12 publications

Improving TCP performance over optical burst-switched (OBS) networks using forward segment redundancy

Improving TCP performance over optical burst-switched (OBS) networks using forward segment redundancy

A Burst Assembly Method for Decreasing End-to-end Packet Delays in Optical Burst Switching Networks

QoS differentiation scheme with multiple burst transmission and virtual resource reservation for optical burst switching networks

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