Single‐Layer Optical Platform Based on WDM/TDM Multiple Access for Large‐Scale “Switchless” Networks

Abstract

Abstract:The European Union ACTS project SONATA will define and' demonstrate a cswitchlessn all-optical network to provide a future single-layer, advanced transport architecture on a national scale. The single-hop, sharedaccess network employs time and wavelength agility (a WDMA/TDMA protocol), using fast tunable transmitters and receivers to route individual customer connections as well as bandwidth pipes through a single wavelength router (suitably replicated for resilience). No electronic switching nodes or cross-connects (telephony, IP, ATM, SDH) are required within the transport network, nor optical cross-connects (save the wavelength routing node), thus providing major transport architecture simplifications and hardware reductions. The network is scalable to 200 Tbit/s throughput over 1,000 krn, connecting 20 million terminals operating at 622 Mbit/s over 50.000-way split c<hyperPONss, by means of 800 WDM channels with 0.05 nm channel spacing (6.25 GHz). Details of network dimensioning, physical layer modeling and network control issues are presented.

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

“…These networks are therefore fundamentally different from the packetswitched single-hop network studied here. We note that AWGbased single-hop WDM networks are also studied in [44]- [46]. However, these networks have either a more complex hub structure with wavelength converters and a centralized resource management [44], [45] or require a large number of transceivers at each node [46].…”

“…We note that AWGbased single-hop WDM networks are also studied in [44]- [46]. However, these networks have either a more complex hub structure with wavelength converters and a centralized resource management [44], [45] or require a large number of transceivers at each node [46]. In contrast, our network is completely passive and resources are allocated in a distributed fashion (as described in the subsequent sections).…”

“…We note that in case , i.e., , we have, from (11), . Inserting this into (44) gives an equation for , which we solve numerically.…”

Comparison of Single-Hop and Multihop AWG Based WDM Networks

“…Due to spatial wavelenth reuse AWG-based WDM networks are highly efficient. These networks range from LANs [2] and Passive Optical Networks (PONs) [5] to national-scale networks [3]. Recently, some AWG-based architectures geared towards the future high-profit metro WDMmarketwerereported [4], [7].…”

HW/SW codesign techniques for dynamically reconfigurable architectures

“…For our case study, we have used the SONATA 1 network [6]. It is a network based on the switchless network concept, which uses a combination of wavelength division multiple access (WDMA) and time division multiple access (TDMA) methods (see Fig.…”