Pulak Chowdhury | University of California, Davis (original) (raw)

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Papers by Pulak Chowdhury

Proceedings of The IEEE, 2012

Passive optical network (PON) is one of the most successful broadband access architectures being ... more Passive optical network (PON) is one of the most successful broadband access architectures being deployed worldwide. PONs provide high capacity, increased reach, and low-power consumption at a very reasonable cost, on par with the cost of DSL deployments today. This paper provides an overview of present and emerging PON technologies, and discusses PON's important role in the evolution of optical access from the architectural perspective. While describing the evolution of optical access architecture, we present two important integration options: optical+wireless access integration and metro+access integration. Potential PON capacity upgrades are discussed with special emphasis on achieving a seamless upgrade. We evaluate different PON evolution strategies in the context of next-generation PON, where gradual, demand-based migration demonstrates a number of significant benefits.

Energy consumption of content-delivery networks employing optical infrastructure is improved if s... more Energy consumption of content-delivery networks employing optical infrastructure is improved if some backbone nodes can also host content. In a typical scenario, up to 18% energy is saved using this approach vs. monolithic datacenter architecture.

Delay is an important metric in Wireless-Optical Broadband Access Network (WOBAN). We introduce e... more Delay is an important metric in Wireless-Optical Broadband Access Network (WOBAN). We introduce external buffer and design Delay-Differentiated Routing Algorithm (DDRA) for WOBAN. We show that delay performance of WOBAN can be improved by DDRA.

IEEE Network, 2009

AbstractThe concept of a hybrid wireless-optical broadband access network (WOBAN) is a very attr... more AbstractThe concept of a hybrid wireless-optical broadband access network (WOBAN) is a very attractive one. This is because it may be costly in several situations to run fiber to every home (or equivalent end-user premises) from the telecom central office (CO); also, providing ...

Optical Switching and Networking, 2011

... is dominated by its energy consumption, so an obvious way to reduce carbon emission is to ...... more ... is dominated by its energy consumption, so an obvious way to reduce carbon emission is to ... High-data-rate transmission also consumes more energy compared to low-data-rate transmissions. ... in the virtual lightpath topology, and s and d index source and destination nodes of a ...

IEEE/OSA Journal of Lightwave Technology, 2012

Hybrid wireless–optical broadband access network (WOBAN) is a promising architecture for future a... more Hybrid wireless–optical broadband access network (WOBAN) is a promising architecture for future access networks. It combines the advantages of two diverse technologies – an optical back end drives a wireless mesh in the front end. It is a cost-effective solution compared to traditional optical access networks since fiber does not need to penetrate to the end user. WOBAN offers untethered flexibility due to its wireless mesh in the front end; yet it provides high transport capacity compared to traditional wireless solutions because of its optical back end. This chapter defines WOBAN, reviews different flavors of its architecture, and provides a comprehensive outline of various design models, coupled with efficient protocols to manage the network. It also argues why the combination of optical and wireless technologies should provide an improved solution for future network design.

IEEE/OSA Journal of Lightwave Technology, 2010

IEEE Journal of Selected Topics in Quantum Electronics, 2011