The perspective of optical packet switching in IP dominant backbone and metropolitan networks

Jourdan, A.; Chiaroni, D.; Dotaro, Emmanuel; Eilenberger, G.; Masetti, F.; Renaud, M.

doi:10.1109/35.910601

Cited by 73 publications

(23 citation statements)

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“…Recall that each of the "new" nodes sends a control packet with probability in the frame. Thus (4) Throughout our analysis, we assume that is large and that and are fixed. We may, therefore, reasonably approximate the BIN distribution with a Poisson distribution, that is (5) which is exact for with fixed.…”

Section: B Analysis Of Control Packet Contentionmentioning

confidence: 99%

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Wavelength reuse for efficient packet-switched transport in an awg-based metro wdm network

Scheutzow

Maier

Reisslein

et al. 2003

J. Lightwave Technol.

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Abstract-Metro wavelength-division multiplexed (WDM) networks play an important role in the emerging Internet hierarchy; they interconnect the backbone WDM networks and the local-access networks. The current circuit-switched SONET/synchronous digital hierarchy (SDH)-over-WDM-ring metro networks are expected to become a serious bottleneck-the so-called metro gap-as they are faced with an increasing amount of bursty packet data traffic and quickly increasing bandwidths in the backbone networks and access networks. Innovative metro WDM networks that are highly efficient and able to handle variable-size packets are needed to alleviate the metro gap. In this paper, we study an arrayed-waveguide grating (AWG)-based single-hop WDM metro network. We analyze the photonic switching of variable-size packets with spatial wavelength reuse. We derive computationally efficient and accurate expressions for the network throughput and delay. Our extensive numerical investigations-based on our analytical results and simulations-reveal that spatial wavelength reuse is crucial for efficient photonic packet switching. In typical scenarios, spatial wavelength reuse increases the throughput by 60% while reducing the delay by 40%. Also, the throughput of our AWG-based network with spatial wavelength reuse is roughly 70% larger than the throughput of a comparable single-hop WDM network based on a passive star coupler (PSC).Index Terms-Arrayed-waveguide grating (AWG), medium access control, metro wavelength-division multiplexed (WDM) network, multiple free spectral ranges, passive star coupler (PSC), photonic packet switching, spatial wavelength reuse.

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Section: B Analysis Of Control Packet Contentionmentioning

confidence: 99%

“…This refined approximation does not approximate the binomial distributions of the random variables [see (4)] and [see (7) …”

Section: Appendix a Refined Approximation Ofmentioning

confidence: 99%

Wavelength reuse for efficient packet-switched transport in an awg-based metro wdm network

Scheutzow

Maier

Reisslein

et al. 2003

J. Lightwave Technol.

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“…The underlying physical topology may be a classical passive optical star, or a ring used for LAN interconnection [1], [3], but the algorithms we propose in this paper may be applied to quite general topologies, such as nation-wide scale optical networks based on array waveguide gratings (AWG) devices interconnecting PONs (see the network architecture proposed in the SONATA project [4]) as well as optical MANs based on a passive switching HUB interconnecting all-optical rings (see the network architecture under study in the DAVID project [2]). However, we are not able to deal with general meshed topologies.…”

mentioning

confidence: 99%

Incremental scheduling algorithms for WDM/TDM networks with arbitrary tuning latencies

Bianco

Guido²,

Leonardi³

2003

IEEE Trans. Commun.

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Abstract-We focus on all-optical broadcast and select slotted WDM networks. Each network user is equipped with one tunable transmitter and one fixed receiver; full connectivity is achieved by tuning transmitters to all different wavelengths available in the optical spectrum. Tuning latencies are considered to be not negligible with respect to the slot time. A network controller allocates fixed size slots in a TDM/WDM frame according to requests issued by users via signalling procedures. User requests are accommodated in the frame incrementally, as soon as they are received by the network controller. Since we aim at an incremental solution, we impose a transparency constraint in the scheduling algorithm: new user requests may be accepted only without affecting existing allocations, otherwise they are refused. We propose a novel scheduling algorithm that may route some flows from source to destination through some intermediate nodes, following a multi-hop approach. A formal definition of an optimal transparent incremental scheduling algorithm is provided as an integer linear programming problem. The optimal incremental scheduling algorithm is NP-hard. Thus, a heuristic quasi-optimal scheduling algorithm is proposed, and its complexity is evaluated. Performance results show that significant benefits can be achieved with respect to traditional single-hop approaches and to other multi-hop approaches.Index Terms-All-optical networks, wavelength division multiplexing.

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“…This method has the advantage of easy to realize and doesn't need complicated clock recovery module; but the realization of control pulse division module is closely related to the length of the packet address, it is needed to increase or decrease the same number of delay fiber when the length of address is increased or decreased. Article [2] realize data extraction from packet through the switch module which are consisted of Mach-Zehnder interferometer based on two-level SOA and Fabry-Perot filter, clock recovery module and address-data separation module; this scheme has the advantage of high speed and flexible; but configuration structure is too complex. By contrast, the method to implement data extraction using AND optical gate has the advantage of high speed in data extraction, simple structure and easy to integrate.…”

Section: Introductionmentioning

confidence: 99%

A Method to Implement Data Extraction Using and Optical Gate Based on Soa - Nolm

Guan¹,

Wang²,

Chen³

et al. 2013

Proceedings of the 2013 International Conference on Advanced Computer Science and Electronics Information

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-A method was proposed to implement data extraction using AND optical gate operation on semiconductor optical amplifier (SOA) based nonlinear optical loop mirror (NOLM). The optical data extraction in FSK/ASK orthogonal modulation system was achieved with the proposed AND gates, in order to prove its feasibility. Through the simulation, the data extraction in orthogonal modulation system with a 10Gbit/s NRZ pseudo-random payload signal and 2.5Gbit/s label signal was demonstrated.Index Terms -Optical label, optical logic gate, orthogonal modulation, semiconductor optical amplifier. I . IntroductionOptical swapping and optical computing are the core unit to achieve all optical signals processing in future all optical networks, they all based on optical logic gates, which are core devices to implement optical swapping system and the key factor of decision network performance. All optical logic gates(XOR、AND)are indispensable part for all optical signal processing,which can be used in all-optical clock recovery, alloptical demultiplexing, all-optical data extraction, etc. Therefore, it has great application potential in future all optical high speed communication network and new generation optical computing.At present, the research of all optical logic gates are focused on the using of nonlinear effect of optical fiber and semiconductor optical amplifier. The nonlinear effect of optical fiber is weak, so that the logic gates based on nonlinear effect of optical fiber will achieve idea effect only by high power input signal or long fiber. SOA become the main functional device to implement all kinds of optical logic gates, because it has many advantages such as small in size, easy to integrate, short response time and strong nonlinear effect. Taking the nonlinear effect advantage of SOA can realize many kinds of optical logic gates, but the design scheme to realize AND gate is relatively less, for example, using twolevel SOA's cross gain modulation effect implementing AND gate, using Mach-Zehnder interferometer based on SOA implementing AND gate, etc. optical data extraction is an important part in optical label swapping system, it is the key factor for all optical network. At present, there have been many design and experiment scheme about optical data extraction. These schemes have it own advantages, but they also have some disadvantages. Article [1] realized all optical data extraction by using start bit in data packet generating address. This method has the advantage of easy to realize and doesn't need complicated clock recovery module; but the realization of control pulse division module is closely related to the length of the packet address, it is needed to increase or decrease the same number of delay fiber when the length of address is increased or decreased. Article [2] realize data extraction from packet through the switch module which are consisted of Mach-Zehnder interferometer based on two-level SOA and Fabry-Perot filter, clock recovery module and address-data separation module; this scheme has ...

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The perspective of optical packet switching in IP dominant backbone and metropolitan networks

Abstract: This article will analyze the rationale and technical solutions for the use of optical packet switching techniques for both backbone and metropolitan applications. It will also provide information on state-of-the-art technologies available for medium-term product development.

Cited by 73 publications

References 1 publication

Wavelength reuse for efficient packet-switched transport in an awg-based metro wdm network

Wavelength reuse for efficient packet-switched transport in an awg-based metro wdm network

Incremental scheduling algorithms for WDM/TDM networks with arbitrary tuning latencies

A Method to Implement Data Extraction Using and Optical Gate Based on Soa - Nolm

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