Experiments over ONRAMP: a reconfigurable optical access network

Vineet Mehta; Sarah E. Dubner; Timothy J. Shepard; Paula J. Donovan; Peter A. Schulz; Joseph Cooley; J. Scott Stadler; Claudia I. Fennelly; Rob Gallagher

doi:10.1117/12.475114

8 July 2002 Experiments over ONRAMP: a reconfigurable optical access network

Vineet Mehta, Sarah E. Dubner, Timothy J. Shepard, Paula J. Donovan, Peter A. Schulz, Joseph Cooley, J. Scott Stadler, Claudia I. Fennelly, Rob Gallagher

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Proceedings Volume 4872, Optical Transmission Systems and Equipment for WDM Networking; (2002) https://doi.org/10.1117/12.475114
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

The integration of electronic routing functions with WDM functions in network elements capable of reconfiguration over short time scales enables access networks to efficiently service time varying demand. An effective coordination of electronic and WDM network functions allows traffic to bypass electronic to optical conversion within the access network. The cost benefits derived from reduced transponder use due to this coordination can result in lower cost access for end users. The transparency of WDM also allows heterogeneous traffic formats to be carried over a common fiber. In this paper, we describe a reconfigurable WDM access network testbed that incorporates features outlined above. This testbed was used in demonstrating network functions such as dynamic lightpath provisioning, packet flow-switching, and remote amplification for supporting large numbers of end users. The testbed network incorporates protection switching and network control capabilities. The testbed network also provides connectivity to an in-ground long haul network. The testbed architecture and description of networking experiments demonstrating its capabilities are presented. The throughput degradation due to optical flow switching for Transport Control Protocol (TCP) data transmissions over large bitrate-delay product links is characterized. Adding the Eifel Algorithm to the TCP implementation restored performance. The performance of a remotely pumped EDFA for serving many users in the collection/distribution network is also presented.

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Vineet Mehta, Sarah E. Dubner, Timothy J. Shepard, Paula J. Donovan, Peter A. Schulz, Joseph Cooley, J. Scott Stadler, Claudia I. Fennelly, and Rob Gallagher "Experiments over ONRAMP: a reconfigurable optical access network", Proc. SPIE 4872, Optical Transmission Systems and Equipment for WDM Networking, (8 July 2002); https://doi.org/10.1117/12.475114

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KEYWORDS

Optical amplifiers

Switches

Switching

Wavelength division multiplexing

Optical networks

Transponders

Signal attenuation

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