Optical Layer-2 switch network based on WDM/TDM nano-sec wavelength switching

Hattori, Kyota; Nakagawa, Masahiro; Kimishima, Naoki; Katayama, Masaru; Misawa, Akira; Hiramatsu, Atsushi

doi:10.1364/eceoc.2012.we.3.d.5

Cited by 15 publications

(9 citation statements)

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“…This entity is called an "Ether-burst converter (EBC) [13]," and it converts variable-length 10G Ethernet (10GE) frames to TSs with a fixed length and transmits them according to the allocated TSs at a constant TDM frame (the length of TDM frame: L FR ). Each node deploys a WDM/TDM SW [12], which enables TS add/drop for any channel and any TS. To allocate the bandwidth for logical paths between EBCs, the OL2SW-NW has a TS scheduler that collects the traffic information on all logical paths for TSA calculated by a high speed TSA algorithm [13].…”

Section: Related Workmentioning

confidence: 99%

“…To achieve this, a WDM/TDM SW is composed of tunable wavelength converters (TWCs) at each input port and a wavelength filter. The WDM/TDM SW changes the route of TSs transmission by changing the wavelength of TS at the TWC, which can change the wavelength for every TS [12]. The TWC is controlled by the TSC based on the information of TSA and TS control timings set by M-node.…”

Section: Structure Of Each Nodementioning

confidence: 99%

“…Therefore, we use the TWC based on Optical-Electrical-Optical (OEO) conversion. In our approach, a TWC consists of a high-speed tunable laser and an optical burst mode receiver [12]. This optical burst mode receiver can recover the phase shift and loss imbalance for TSs from an adjacent node.…”

Section: Structure Of Wdm/tdm Swmentioning

confidence: 99%

“…However, the application of long reach PON has resulted in several issues, such as optical burst mode amplifications to support long reach with lower CAPEX [10] and a decrease in the network delay caused by dynamic bandwidth allocation (DBA) [11]. As a different method to achieve a cost-effective aggregation network, rather than a converged approach for the access network in terms of current network architecture, we have been studying an approach to incorporate the optical burst control techniques used in the PON, such as 10G-EPON, to the aggregation network, specifically, the optical Layer-2 switch network (OL2SW-NW) [12]- [18]. OL2SW-NW was designed based on the application of bufferless optical time division multiplexing (TDM) and DBA to achieve a large-scale cost-effective aggregation NW.…”

Section: Introductionmentioning

confidence: 99%

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Bufferless Bidirectional Multi-Ring Networks with Sharing an Optical Burst Mode Transceiver for Any Route

Hattori

Nakagawa

Matsuda

et al. 2017

IEICE Trans. Inf. & Syst.

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SUMMARYImprovement of conventional networks with an incremental approach is an important design method for the development of the future internet. For this approach, we are developing a future aggregation network based on passive optical network (PON) technology to achieve both cost-effectiveness and high reliability. In this paper, we propose a timeslot (TS) synchronization method for sharing a TS from an optical burst mode transceiver between any route of arbitrary fiber length by changing both the route of the TS transmission and the TS control timing on the optical burst mode transceiver. We show the effectiveness of the proposed method for exchanging TSs in bidirectional bufferless wavelength division multiplexing (WDM) and time division multiplexing (TDM) multi-ring networks under the condition of the occurrence of a link failure through prototype systems. Also, we evaluate the reduction of the required number of optical interfaces in a multi-ring network by applying the proposed method.

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Section: Related Workmentioning

confidence: 99%

Section: Structure Of Each Nodementioning

confidence: 99%

Section: Structure Of Wdm/tdm Swmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bufferless Bidirectional Multi-Ring Networks with Sharing an Optical Burst Mode Transceiver for Any Route

Hattori

Nakagawa

Matsuda

et al. 2017

IEICE Trans. Inf. & Syst.

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“…Other examples exploit global synchronization with preengineered fiber link lengths and use either GPS [7] or a master clock reference [6,9] that is distributed in the network, without accounting for the propagation delay among nodes. Even though theoretically this enables accurate operation, in practice it introduces severe limitations on the network flexibility, planning and maintenance as fiber lengths must be accurately controlled.…”

Section: Overview Of Previous Work On Synchronizationmentioning

confidence: 99%

Synchronization in a Random Length Ring Network for SDN-Controlled Optical TDM Switching

Kamchevska¹,

Cristofori²,

Ros³

et al. 2016

J. Opt. Commun. Netw.

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Abstract-In this paper we focus on optical TDM switching and its main distinguishing characteristics compared to other optical subwavelength switching technologies. We review and discuss in details the synchronization requirements that allow for proper switching operation. In addition, we propose a novel synchronization algorithm that enables automatic synchronization of SDN-controlled all-optical TDM switching nodes connected in a ring network. Besides providing synchronization, the algorithm can also facilitate dynamic slot size change and failure detection. We experimentally validate the algorithm behavior and achieve correct operation for three different ring lengths. Moreover, we experimentally demonstrate data plane connectivity in a ring network composed of three nodes and show successful WDM-SDM transmission and switching of data bursts when using the proposed algorithm to provide synchronization.

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Proposal of scale-out control architecture of virtual wide area layer-2 switch on metro network

Date

Higuchi

Katayama

et al. 2013

2013 19th Asia-Pacific Conference on Communications (APCC)

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Power consumption of network equipment has been rapidly increasing, so it is therefore necessary to build a resource efficient network (NW). Router virtualization, which involves dynamically reallocating virtual routers to physical resources as a server virtualization, is becoming more common as a way to use network equipment effectively and robustly. Especially, edge router which is gateway of core network should be virtualized, because edge routers have many functions and resources just as servers do. A metro NW is wide area layer-2 aggregation NW that connects each user's residential gateway to edge routers. To achieve edge router virtualization, the metro NW must trace the dynamic edge router reallocation by changing a route of each Ethernet flow. Furthermore, access/metro NWs occupy a large proportion of the total NW power consumption, so logically centralized control architecture suits to the metro NW to change routes flexibly because it can use resources effectively by avoiding resource deployment in many locations. However, it is not scalable. When many Ethernet flows need to be accommodated in a metro NW, it can not change routes of the flows quickly enough. Therefore, we propose a virtual wide area layer-2 switch architecture with scale-out control that can improve the route control performance even in a worst case edge router node failure by processing in parallel flow-by-flow, by considering route information, and by rebalancing the load between parallel processes dynamically. We evaluated the proposed architecture through theoretical analysis and experiments with prototype. The results showed that the proposed architecture can increase the number of flows accommodated in a metro NW.

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Optical Layer-2 switch network based on WDM/TDM nano-sec wavelength switching

Cited by 15 publications

References 1 publication

Bufferless Bidirectional Multi-Ring Networks with Sharing an Optical Burst Mode Transceiver for Any Route

Bufferless Bidirectional Multi-Ring Networks with Sharing an Optical Burst Mode Transceiver for Any Route

Synchronization in a Random Length Ring Network for SDN-Controlled Optical TDM Switching

Proposal of scale-out control architecture of virtual wide area layer-2 switch on metro network

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