Performance Evaluation of a Bufferless OBS/OPS Network With 1 + 1 Path Protection

Li, Shuo; Wang, Meiqian; Øverby, Harald; Wong, E.W.M.; Zukerman, Moshe

doi:10.1109/lpt.2015.2453204

Cited by 4 publications

(20 citation statements)

References 6 publications

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“…The accuracy of the new approximation is validated. The results demonstrate that the new approximation is significantly more accurate than the one in [3] in the case of no wavelength conversion.…”

mentioning

confidence: 84%

“…In [3], the BLR approximation overestimates the network BLR, because in [3] we assumed that a newly generated burst will randomly chooses one wavelength among all the wavelengths in the first trunk on its path. Then if all the channels in that wavelength are busy, the burst is blocked without trying other wavelengths that may have available channels.…”

Section: Blr Approximationmentioning

confidence: 99%

“…An equivalent term is packet loss ratio for Optical Packet Switched (OPS) networks. As in [3], for sake of simplicity of exposition, we will henceforth use the term burst for a burst in OBS networks, or a packet in OPS networks, without loss of generality. Yu et al [4] proposed a 1 + X protection mechanism where the ingress node sends 1+X identical copies of a burst over 1 + X disjoint paths in order to protect the network from at most X simultaneous link (trunk) failures.…”

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confidence: 99%

“…In [3], we proposed a method based on Erlang Fixed-Point Approximation (EFPA) to evaluate the BLR in a network with 1+1 protection. This approximation was shown to be accurate in the case of full wavelength conversion, but not so accurate in the case of no wavelength conversion.…”

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confidence: 99%

“…Firstly, we introduce a new EFPA-based method that improves the accuracy of [3], especially in the case of no wavelength conversion. Secondly, we extend the work in [3] from 1 + 1 protection to 1 + X protection, and thirdly, we provide discussions on QoS effects associated with varying parameters such as X and the proportion of premium traffic. The accuracy of the new approximation is validated.…”

mentioning

confidence: 99%

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Evaluation of Burst/Packet Loss Ratio in a Bufferless OBS/OPS Network With <inline-formula> <tex-math notation="LaTeX">$1+X$ </tex-math> </inline-formula> Path Protection

Wang

Wong

et al. 2016

IEEE Photon. Technol. Lett.

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The importance of avoiding burst/packet loss because of equipment failures, especially for critical-mission services, gives rise to a method known as 1+ X path protection in optical networks. This method provides additional protection for premium (including emergency) services than the more common 1 + 1 path protection. In this letter, we consider a bufferless optical burst switched (OBS)/optical packet switched (OPS) network with two types of users: premium (that receive 1 + X protection service) and regular (that do not receive such a service). We propose an analytical method based on Erlang fixedpoint approximation to evaluate the burst/packet loss of such OBS/OPS network. We demonstrate numerically the accuracy of the approximation, and also the effect and implications of the proportion of the premium traffic as X increases.Index Terms-Burst loss ratio, optical burst/packet switching, 1 + X path protection, Erlang fixed-point approximation.

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confidence: 84%

Section: Blr Approximationmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

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Evaluation of Burst/Packet Loss Ratio in a Bufferless OBS/OPS Network With <inline-formula> <tex-math notation="LaTeX">$1+X$ </tex-math> </inline-formula> Path Protection

Wang

Wong

et al. 2016

IEEE Photon. Technol. Lett.

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Dropping probability reduction in OBS networks: A simple approach

Elrasad

Rabia

Mahmoud

et al. 2016

Optik

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Performance Modeling of Diversity Coded Path Protection in OBS/OPS Networks

Wong

Øverby

et al. 2019

J. Lightwave Technol.

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In bufferless optical burst/packet switched (OBS/OPS) networks, data (bursts or packets) may be lost due to contention or equipment failure. Diversity coding-based path protection schemes can be used to protect data from a single-trunk-failure with potentially more efficient resource utilization compared to dedicated (e.g. 1+1) path protection schemes and help reduce the burst/packet loss ratio. This paper provides a scalable and accurate burst/packet loss ratio approximation based on the Erlang Fixed-Point Approximation for networks that employ protection based on diversity coding and for networks that employ protection based on both diversity coding and 1+1 path protection. We use discrete event simulations to assess the accuracy of the approximation based on a wide range of and scenarios in a 10-node circular lattice and NSFNet networks. Further, we discuss the effect of parameter settings and the effect of the choice of the wavelength selection method on the accuracy of the approximation. We consider scenarios without wavelength conversion and with full wavelength conversion and two types of users: premium and regular. The premium users, typically of mission critical services, receive protection while the regular users do not. We compare diversity coding and 1+1 path protection in a 10-node circular lattice network. The results show that for this example network, for the premium users and under low traffic load, the burst/packet loss ratio in OBS/OPS networks is lower for diversity coding compared to 1+1 path protection. However, under heavy traffic load, we observe a lower loss ratio for the case of 1+1 path protection.

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Performance Evaluation of a Bufferless OBS/OPS Network With 1 + 1 Path Protection

Cited by 4 publications

References 6 publications

Evaluation of Burst/Packet Loss Ratio in a Bufferless OBS/OPS Network With <inline-formula> <tex-math notation="LaTeX">$1+X$ </tex-math> </inline-formula> Path Protection

Evaluation of Burst/Packet Loss Ratio in a Bufferless OBS/OPS Network With <inline-formula> <tex-math notation="LaTeX">$1+X$ </tex-math> </inline-formula> Path Protection

Dropping probability reduction in OBS networks: A simple approach

Performance Modeling of Diversity Coded Path Protection in OBS/OPS Networks

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