Novel Automatic Service Restoration Technique by Using Self-Reconfiguration of Network Resources for a Disaster-struck Metro-Access Network

Kanai, Tatsuaki; Senoo, Yasutoshi; Asaka, Kota; Sugawa, Jun; Tamai, Hiroshi; Saito, Hiroyuki; Minato, Naoki; Oguri, Atsushi; Sumita, Seiya; Sato, Tomomasa; Kikuchi, Nobuhiko; Matsushita, Satoshi; Tsuritani, Takehiro; Okamoto, Satoru; Yamanaka, Naoaki; Suzuki, Keisuke; Otaka, Akira

doi:10.1109/jlt.2017.2787999

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…Classical optical restoration techniques are the most relevant work to this paper. Although the benefits of optical restoration have been demonstrated in prior work [30,32,45,49,52,56,74,82], to the best of our knowledge, there is no practical study of optical restoration in modern WANs. Arrow makes two novel contributions.…”

Section: Related Workmentioning

confidence: 98%

“…The third row of Table 10 presents optical restoration [30,32,45,49,52,56,72,74,82]. Instead of pre-allocating failover paths, optical restoration techniques dynamically shift the wavelengths from the cut fiber onto healthy surrogate fibers.…”

Section: A9 Prior Work Comparisonmentioning

confidence: 99%

“…This idea is called optical restoration and was proposed two decades ago [30]. Despite several follow up papers [32,45,49,52,56,72,74,82] and the presence of commercially available devices capable of wavelength reconfiguration, such as Reconfigurable Optical Add Drop Multiplexers (ROADMs) [2,4], the deployment of prior proposals of optical restoration at scale has several challenges, as we describe next.…”

Section: Introductionmentioning

confidence: 99%

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Arrow

Zhong

Ghobadi

Khaddaj

et al. 2021

Proceedings of the 2021 ACM SIGCOMM 2021 Conference

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Fiber cut events reduce the capacity of wide-area networks (WANs) by several Tbps. In this paper, we revive the lost capacity by reconfiguring the wavelengths from cut fibers into healthy fibers. We highlight two challenges that made prior solutions impractical and propose a system called Arrow to address them. First, our measurements show that contrary to common belief, in most cases, the lost capacity is only partially restorable. This poses a cross-layer challenge from the Traffic Engineering (TE) perspective that has not been considered before: "Which IP links should be restored and by how much to best match the TE objective?" To address this challenge, Arrow's restoration-aware TE system takes a set of partial restoration candidates (that we call LotteryTickets) as input and proactively finds the best restoration plan. Second, prior work has not considered the reconfiguration latency of amplifiers. However, in practical settings, amplifiers add tens of minutes of reconfiguration delay. To enable fast and practical restoration, Arrow leverages optical noise loading and bypasses amplifier reconfiguration altogether. We evaluate Arrow using large-scale simulations and a testbed. Our testbed demonstrates Arrow's end-to-end restoration latency is eight seconds. Our large-scale simulations compare Arrow to the state-of-the-art TE schemes and show it can support 2.0×-2.4× more demand without compromising 99.99% availability.

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Section: Related Workmentioning

confidence: 98%

Section: A9 Prior Work Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Arrow

Zhong

Ghobadi

Khaddaj

et al. 2021

Proceedings of the 2021 ACM SIGCOMM 2021 Conference

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“…Each PON system is connected to a metro network consisting of a multi-ring topology. Recently, access-metro convergence networks (AMCNs) have received attention because they can reduce costs by aggregating the optical line terminals (OLTs) on the relay nodes of the metro network to a single node between the metro network and core network [3], [4]. In particular, NTT corporation in Japan has released concept of innovative optical wireless network (IOWN) that aims to realize all-photonic network without electrical and digital signal processing in the middle of end-to-end path [16].…”

Section: Introductionmentioning

confidence: 99%

Remotely Pumped All-Optical Wavelength Conversion for WDM-PON-Based Access-Metro Convergence

et al. 2021

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Access-metro convergence networks (AMCN) have been proposed as a future optical communication network to realize flexible and dynamic bandwidth allocation. An AMCN requires transceivers with different wavelengths for the optical network units (ONUs). This causes an increase in production costs. Although an all-optical wavelength converter (AOWC) mitigates this issue, the AOWC increases the installation cost because it consists of many expensive optical devices. We propose the use of a remotely pumped AOWC (RP-AOWC) with an AMCN. The proposed technique can reduce the number of pump light sources in the AOWC. This paper demonstrates this reduction in the number of light sources and the feasibility of wavelength conversion using pump light propagation. We calculate the reduction in the number of pump sources and the number of transceiver types caused by the use of RP-AOWC and experiment with the wavelength conversion using pump light propagation.

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