~srini / sponsors
National Science Foundation
ITR: Forward Error Correction Codes for Next Generation Optical Networks (ANI-0325979)
August 2003 - July 2008
PI: Bane Vasic
Co-PIs: Ray Kostuk, Mark Neifeld, Michael Marcellin, Marwan Krunz, Srinivasan Ramasubramanian, David Geraghty
The goal of the proposed research is to develop a framework for forward error control (FEC) in combination with bandwidth management and routing in optical networks that is aware of optical channel characteristics and can allocate network resources to optimize system performance. The FEC schemes are based on low-density parity-check codes and iterative joint detection/decoding techniques that mitigate (linear and nonlinear) distortion and crosstalk. The adaptive error protection FEC techniques will be developed that are tailored for the time-varying characteristics of requirements of optical networks. Network management protocols supporting novel FEC schemes will be developed and tested to demonstrate their efficiency and benefit in next generation optical networks. Novel network path selection algorithms will be developed for primary and backup paths in heterogeneous environments that satisfy constraints imposed by both variable network requests and the physical layer. The project will also give the extent to which the combined coding and network management techniques can be used to relax constraints on optical communications materials and devices.
Collaborative Research: NeTS-NR: Evolutionary Architectures for Ultra-Broadband Access Networks
(ANI-0435490)
September 2004 - August 2008
PIs: Srinivasan Ramasubramanian, Arun K. Somani, Suresh Subramaniam
There is a significant mismatch between core and access network capacities currently prevalent. In order to stimulate viable large-scale fiber deployment in the last mile, an evolutionary approach to building high-capacity access net-works is called for. This project develops such an approach by providing solu-tions that can evolve starting from lower-cost wireless-based ones to the ulti-mate fiber-to-the-home (FTTH) solution. Architectural solutions for metro net-works and neighborhood access networks that allow high-speed packet switch-ing and provide efficient aggregation methods to multiplex bandwidth from vari-ous access points are developed. In particular, an evolutionary path from more cost-effective wireless and free-space optics-based solutions to FTTH for neighborhood networking is developed. Solutions ranging from high-speed elec-tronic packet-switching to all-optical WDM/TDM for metro networking are also investigated. Analytical modeling and simulation tools to evaluate the perform-ance of the architectures are also provided. By targeting a critical area in future networking infrastructure research, the project's outcomes will have immediate and wide practical implications in network development. The results of the pro-ject will lead to a roadmap for the development of the next generation access network infrastructure.
Cisco Systems
Sustainable Multipath Routing in Packet-Switched Networks
July 2007 - June 2008
Channel Access and Connection Establishment in Multi-Channel Wireless Networks
January 2008 - December 2008
ASSET India Foundation
Implementation of Solar Powered Wireless Router - Phase I
January 2009 - May 2009
Connection One
Efficient Techniques for Multipath Routing in Packet-Switched Networks
August 2005 - July 2006
Supporting Multiple Protection Strategies in MPLS/GMPLS Networks
August 2004 - June 2005
Arizona Center for Information Science and Technology (ACIST)
Energy-Efficient Forwarding Schemes and Scheduling in Sensor Networks
August 2004 - July 2005
PIs: Alon Efrat, Srinivasan Ramasubramanian
Operating System Specialization for Sensor Networks
August 2004 - July 2006
PIs: Saumya Debray, Alon Efrat, Srinivasan Ramasubramanian