Ivan D. Barrera

Ph.D. in Electrical and Computer Engineering Fall 2010
University of Delaware, Newark, DE. Advisor: Dr. Gonzalo Arce, Ph.D. GPA: 3.9/4.0
Research Topic: Signal processing applied to computer networks, image and audio processing, and analog to digital converters.
Dissertation:Statistical Approaches for Congestion Control in Computer Networks.
Interests:Signal processing applied to computer networks, embedded systems, image processing, and audio processing.
B.S. in Electrical and Computer EngineeringSpring 2000
Universidad Javeriana, Colombia. Advisor: Dr. Mario Gongora, Ph.D. GPA: 4.1/5.0
Thesis Topic:Diagnostics System for Nortel DMS-100i Digital Subscriber Line Cards.
Awards:Research grant from Nortel Networks for development of a testing device.
Nomination for best thesis award.
Research Assistant, University of Delaware2003 - 2010
  • Analysis and classification of VoIP packet streams (SIP and RTP) oriented towards intrusion detection applications.
  • Design of an Analog to Digital Converter (ADC) architecture aimed at reduced size and power consumption.
  • Successful development and simulation of a novel algorithm to counteract buffer-bloat and mitigate congestion in TCP networks.
  • Spectral analysis and shaping of congestion marks in TCP/IP networks for queue stabilization in routers.
  • Formulation of a statistical model of router queues for detection of congestion in TCP/IP networks.
  • Analysis of the impact of Active Queue Management (AQM) on the statistical distribution of routers' buffers.
  • Programming C++, TCL, Matlab and shell scripts for efficient and distributed simulation of networked systems
Research and Teacher Assistant, Pontificia Universidad Javeriana1996 - 2000
  • Design and development of a micro-controlled device for testing Nortel DMS-100i digital subscriber lines.
  • Robust programming of a Motorola micro-controller to interface the circuitry, and a Windows-based GUI to retrieve and display the results.
  • Teaching assistance in math, calculus, electronic devices and analog circuit design.
  • Design and development of the electrical engineering department web site.
Network and Systems Services Intern, University of Delaware 2009 - 2010
  • Development and implementation of web-based tools for monitoring and visualization of critical cooling systems.
  • Development, implementation and documentation of the back and front ends of a bus tracking system, using JavaScript, PHP, PostgreSQL, and the Google Maps API.
  • Characterization of cellular wireless routers for real-time GPS tracking of the university buses.
  • Management and tuning the results of the University of Delaware Google Search Appliance.
  • Statistical analysis of Netflow data to determine high utilization ports and hosts.
IT Support for ECE/CIS Department, University of Delaware2003 - 2008
  • Deployment and maintenance of the department wireless network. In particular, implementation of a centralized RADIUS server for 802.11x EAP/TTLS secure authentication, compatible with the Unix-based account system.
  • Troubleshoot, support and installation of department owned equipment.
Network Operation Center Engineer, Impsat (Global Crossing)2000 - 2003
  • Configuration of customer services on different multiplexer systems (TDM, Frame Relay, ATM, SDH).
  • Configuration of devices for network access, including including satellite, radio, copper and fiber equipment.
  • Optimization of customer data paths for improved performance and reduced impact during network outages.
  • Efficient analysis and solution of backbone network failures to ensure network availability.
  • Development and execution of performance routines on the backbone network to improve the network reliability.
  • Interaction with contractors and customers for troubleshooting, maintenance and configuration of services.
SGI support engineer, Procalculo S.A.1999 - 2000
  • Installation and configuration of Silicon Graphics (SGI) equipment.
  • Troubleshooting and maintenance of servers, workstations and other customer equipment.
Wire-line Switching Department Intern, Nortel Networks1998
  • Programming translation tables of DMS-100i telephone exchange switches.
  • Supporting Telecom technical team in the joint venture between Telecom and Nortel.
Professional Affiliations and Activities
  • Institute of Electrical and Electronics Engineers (IEEE).
  • Society of Hispanic Professional Engineers (SHPE).
  • IEEE Transactions on Networking - Reviewer.
  • Linux User Group (LUG) - University of Delaware Chapter.
Skill Set
  • Networking:
L1, L2, L3 and L4 networking protocols and devices (traffic analyzers, sniffers, BER testing, multiplexers, modems, switches, routers). Particular focus on transport layer protocols.
  • Programming Languages:
Experience coding in Matlab, C/C++, PHP, OS Scripting, TCL.
  • Hardware design:
Digital circuit design, Micro-controlled devices, FPGA.
  • Certified Seminars:
Methods of Operation and Maintenance - Nortel DMS-100 Switches (by Nortel), Unix Systems Installation and Administration (by Procalculo S.A.), Development of Internet Applications (by Universidad Javeriana)
  • Languages:
Fluent in English and Spanish.
  1. I.D. Barrera, S. Bohacek, G.R. Arce, Statistical detection of congestion in routers, IEEE Transactions on Signal Processing 58 (3) 2010 957-968. doi:10.1109/TSP.2009.2034917
  2. I.D. Barrera, G.R. Arce, S. Bohacek, Statistical approach for congestion control in gateway routers, Elsevier Computer Networks, 55 (3) 2011 572-582. doi:10.1016/j.comnet.2010.09.009
ivan . ibarrera . com