September 10, 2015

The Future of Wide Area Networks

  • Lakshman T.
  • Sparks K.
  • Thottan M.

We are entering a new technological era where everything will be digitized and there will be an unprecedented demand to connect this massive new set of digital goods to create new value in terms of automation of lives and systems. The network will require the ability to deliver information and entertainment content at massive scale but with an economic outlay that is not vastly different than today. This requirement comes at a time when we have reached the physical limits of todays network performance and so a top to bottom restructuring of networks is required, with a wholesale shift to highly distributed, highly intelligent optimized networking. Todays self contained standalone networking constructs whether it be an operator, a network, a network layer, or a network element will be dis-aggregated and then realigned and reintegrated at different levels using a set of new software platforms and interfaces. This will require a new automated control paradigm that will make networks truly programmable and the essential building blocks of a new digital connected reality.

Recent Publications

January 01, 2018

Fair Dynamic Spectrum Management for QRD-Based Precoding with User Encoding Ordering in Downstream G.fast Transmission

In next generation DSL networks such as G.fast, employing discrete multi-tone transmission in high frequencies up to 212 MHz, the crosstalk among lines reaches very high levels. To precompensate the crosstalk in downstream transmission, QRD-based precoding has been proposed as a near-optimal dynamic spectrum management (DSM) technique. However, the performance ...

January 01, 2018

Practical Mitigation of Passive Intermodulation in Microstrip Circuits

This paper presents new experimental evidence and a novel practical approach for mitigation of passive intermodulation (PIM) in microstrip circuits fabricated on commercial printed circuit board laminates. The mechanisms of distributed PIM in microstrip circuits are reviewed and a phenomenology of PIM generation due to locally enhanced electromagnetic fields at ...

January 01, 2018

Efficient Cooperative HARQ for Multi-Source Multi-Relay Wireless Networks

In this paper, we compare the performance of three different cooperative Hybrid Automatic Repeat reQuest (HARQ) protocols for slow-fading half-duplex orthogonal multiple access multiple relay channel. Channel State Information (CSI) is available at the receiving side of each link only. Time Division Multiplexing is assumed, where each orthogonal transmission occurs ...