E Roberto Rojas-Cessa



Fall 2018: Looking for a highly self-motivated MS student with interest in performing research on computer networking. Some financial aid is available. Requirements: 3.5 or higher GPA in NJIT courses, registered student to graduate in May 2019 or after. Working period: Fall 2018-Spring 2019. Start time: Fall 2018 or asap. Please email your interest and copy resume to rojas@njit.edu.

Prospective and highly competitive and self-motivated Ph.D. students interested in performing research on computer networking and IoT, please contact me (rojas@njit.edu), preferably before you apply. Include resume (with GPA, GRE scores, and list of publications) in your email.
Controllable-Delivery Power Grid
The Controllable-Delivery power Grid (CDG) is a version of a digital grid; a fusion of communications as in computer networks and the power grid that distributes energy (power delivery in a given time) in the form of packets. These packets carry a discrete amount of energy so that delivery is finely managed. With such a control of energy on its delivery, requesting energy ahead of time is needed and a request-grant protocol (similar to that used by an Internet browser or http) is used. Although imagining energy packets is difficult, the concept of them helps us to provide boundaries on the amounts of energy delivered to loads and reliable routing of energy to the region of the grid that demand it. Energy packets share some of the features of Internet datagrams; they carry a header to enable grid nodes the handling of that energy. An energy packet carries information about the load that receives it, such as an address, enabling then energy ownership. In this way, the load that is to receive the energy packet is well defined. In a digital grid, every component of the grid is a communicative device to which information and energy can be addressed. Therefore, a digital grid is a natural environment of Internet of Things. In the current phase of this project, we aim at finding out how to discretize energy so that building a digital grid is feasible and how to use most of its properties to enhance and improve the properties of the power grid. At this time, we have built a series of testbeds and they are being used as proof-of-concept. These testbeds are available to interested peers. This research project is partially sponsored by National Science Foundation. Role: Principal Investigator.
Free Space Optical Communications
Optical signals is a form of wireless signal that may be directional and therefore, be able to control the direction of propagation. More importantly, the high frequency of light is able to carry large amounts of information. We are researching new methods for communications using laser light and more. Mobile communications pose special challenges, such as diverse mobility and geographical positioning of stations, range, power, and handovers. Role: Co-Principal Investigator
High Performance Packet Switches
Routers are the systems that interconnect networks. The performance of a network then depends on the performance of routers. The forwarding of packets in a router involves several processing, where the most common are destination lookup and switching of packets. These two tasks must be executed at run time. Our research is aimed to seek packet forwarding strategies that treat packets and connections fairly, and that provide high speed forwarding such that packets traverse networks fast.
Network Measurement
The performance of networks is determined by several parameters. We are developing different measurement methodologies to evaluate network performance and to learn more about how networks behave under different traffic patterns. We consider the evolution of network technologies and identify the challenges that measurement has as data rates increase.
QoS Networks, Network Reliability
Applications with high demands of network parameters are often identified as application with quality-of-service (QoS) demands. In this this field, we have the objective to develop different schemes for scheduling of packet and routing schemes to provision resources so that networks can provide QoS guarantees. A project in this area was partially supported by National Science Foundation.
Distributed Systems
Most processes in packet networks have a distributed nature. Examples are routing algorithms, architecture of high performance routers, networking computing, and others. In this topic, we investigate several aspects of control and packet management in networks, such as the Internet, and we focus in specific in peer to peer communications, forwarding of packet at high speeds, and wireless networks, as examples.


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