TY - JOUR
T1 - Wavelength reuse for efficient packet-switched transport in an AWG-based metro WDM network
AU - Scheutzow, Michael
AU - Maier, Martin
AU - Reisslein, Martin
AU - Wolisz, Adam
N1 - Funding Information:
Manuscript received June 13, 2002; revised March 10, 2003. This work was supported in part by the Federal German Ministry of Education and Research within the TransiNet Project, the DFG Research Center “Mathematics for key technologies” (FZT86) Berlin, and by the National Science Foundation under Grant CAREER ANI–0133252. A shorter version of this paper has appeared in Proc. IEEE INFOCOM, New York, June 2002, pp. 1432–1441 [47].
PY - 2003/6
Y1 - 2003/6
N2 - 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).
AB - 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).
KW - Arrayed-waveguide grating (AWG)
KW - Medium access control
KW - Metro wavelength-division multiplexed (WDM) network
KW - Multiple free spectral ranges
KW - Passive star coupler (PSC)
KW - Photonic packet switching
KW - Spatial wavelength reuse
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U2 - 10.1109/JLT.2003.812723
DO - 10.1109/JLT.2003.812723
M3 - Article
AN - SCOPUS:0042921509
SN - 0733-8724
VL - 21
SP - 1435
EP - 1455
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 6
ER -