7 research outputs found
Proceedings of the 5th International Workshop on Reconfigurable Communication-centric Systems on Chip 2010 - ReCoSoC\u2710 - May 17-19, 2010 Karlsruhe, Germany. (KIT Scientific Reports ; 7551)
ReCoSoC is intended to be a periodic annual meeting to expose and discuss gathered expertise as well as state of the art research around SoC related topics through plenary invited papers and posters. The workshop aims to provide a prospective view of tomorrow\u27s challenges in the multibillion transistor era, taking into account the emerging techniques and architectures exploring the synergy between flexible on-chip communication and system reconfigurability
Building the Future Internet through FIRE
The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate
A protocol design paradigm for rateless fulcrum code
Establecer servicios Multicast eficientes en una red con dispositivos heterog茅neos y bajo los efectos de un canal con efecto de borradura es una de las prioridades actuales en la teor铆a de la codificaci贸n, en particular en Network Coding (NC). Adem谩s, el creciente n煤mero de clientes con dispositivos m贸viles de gran capacidad de procesamiento y la prevalencia de tr谩fico no tolerante al retardo han provocado una demanda de esquemas Multicast sin realimentaci贸n en lo que respecta a la gesti贸n de recursos distribuidos. Las plataformas de comunicaci贸n actuales carecen de un control de codificaci贸n gradual y din谩mico basado en el tipo de datos que se transmiten a nivel de la capa de aplicaci贸n. Este trabajo propone un esquema de transmisi贸n fiable y eficiente basado en una codificaci贸n hibrida compuesta por una codificaci贸n sistem谩tica y codificaci贸n de red lineal aleatoria (RLNC) denominada codificaci贸n Fulcrum. Este esquema h铆brido de codificaci贸n distribuida tipo Rateless permite implementar un sistema adaptativo de gesti贸n de recursos para aumentar la probabilidad de descodificaci贸n durante la recepci贸n de datos en cada nodo receptor de la informaci贸n. En 煤ltima instancia, el esquema propuesto se traduce en un mayor rendimiento de la red y en tiempos de transmisi贸n (RTT) mucho m谩s cortos mediante la implementaci贸n eficiente de una correcci贸n de errores hacia delante (FEC).DoctoradoDoctor en Ingenier铆a de Sistemas y Computaci贸
Building the Future Internet through FIRE
The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate
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Integrated Scheduling and Beam Steering for Spatial Reuse
This document describes an approach to integrating antenna selection and control into a time-division MAC scheduling process. I argue that through such integration it is possible to achieve greater spatial reuse and interference mitigation than by solving the two problems separately. Without coupling between the MAC scheduling and physical antenna configuration processes, a \u22chicken-and-egg\u22 problem exists: If antenna decisions are made before scheduling, they cannot be optimized for the communication that will actually occur. If, on the other hand, the scheduling decisions are made first, the scheduler cannot know what the actual interference and communications properties of the network will be.
This dissertation presents algorithms for optimal spatial reuse TDMA scheduling with reconfigurable antennas. I present and solve the joint beam steering and scheduling problem for spatial reuse TDMA and describe an implemented system based on the algorithms developed. The algorithms described achieve up to a 600% speedup over TDMA in the experiments performed. This is based on using an optimization decomposition approach to arrive at a working distributed protocol which is equivalent to the original problem statement while also producing optimal solutions in an amount of time that is at worst linear in the size of the input. This is, to the best of my knowledge, the first actually implemented STDMA scheduling system based on dual decomposition. This dissertation identifies and briefly address some of the challenges that arise in taking such a system from theory to reality