'Collision probability' diaporamas de présentation

Basic Physics of Nuclear Reactors

Basic Physics of Nuclear Reactors. Prof. Paddy Regan, Dept. of Physics University of Surrey Guildford, UK. Feb, 2014. Several components are important for a controlled nuclear reactor: Fissionable fuel Moderator to slow down neutrons

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Author: Paul Hora?iu P ? tra? Advisor: Dr. Albert Banchs Roca

Control-Theoretic Adaptive Mechanisms for Performance Optimization of IEEE 802.11 WLANs: Design, Implementation and Experimental Evaluation. Author: Paul Hora?iu P ? tra? Advisor: Dr. Albert Banchs Roca. Outline. Motivation & Background Centralized Adaptive Control (CAC) Algorithm

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Content

Content. Error detection and correction MAC sub-layer Ethernet Token Ring. Access Protocols. Who gets to use the channel next? Fixed/Static assignment Demand assignment Contention Turn-Based . Contention Access Protocols . No coordination between hosts

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The Final Present

The Final Present . Lee Jeng-Shiou Computer Network of E.E. Outline. Throughput Analysis Review for Single-hop Networks Throughout Analysis for Multi-hop Networks Mathematical Analysis of the String Topology Analytical and Simulation Results

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Chapter 5 Link Layer

CPE 400 / 600 Computer Communication Networks. Lecture 21. Chapter 5 Link Layer. slides are modified from J. Kurose & K. Ross. Some terminology: hosts and routers are nodes communication channels that connect adjacent nodes along communication path are links wired links wireless links

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Link Layer: Introduction

Terminology: hosts and routers are nodes communication channels that connect adjacent nodes along communication path are links wired links wireless links LANs layer-2 packet is a frame , encapsulates datagram. Link Layer: Introduction. data-link layer has responsibility of

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ECE 4450:427/527 - Computer Networks Spring 2014

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Beyond Co-existence: Exploiting WiFi White Space for ZigBee Performance Assurance

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Cross-Layer Protocol Design and Optimization for Delay/Fault-Tolerant Mobile Sensor Networks

Cross-Layer Protocol Design and Optimization for Delay/Fault-Tolerant Mobile Sensor Networks. IEEE J ournal of S elected A reas in C ommunications, 2008 Yu Wang, Hongyi Wu, Feng Lin, and Nian-Feng Tzeng Presented by Hanjin Park (September 16, 2008) Computer Network Lab. Contents.

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UMTS simulator

UMTS simulator. Alberto Bona, Maurizio Conti. Politecnico di Torino. Scenario(1). General Assumption: Simulator time step is equal to 1 frame (10 ms) Advantages: Bit rate can be varied every TTI Transport channel accuracy Simpler and faster Limitations:

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Why Simple Hash Functions Work : Exploiting the Entropy in a Data Stream

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Frame Delay Distribution Analysis of 802.11 Using Signal Flow Graphs

19 th FFV Workshop. Frame Delay Distribution Analysis of 802.11 Using Signal Flow Graphs. Ralf Jennen Communication Networks Research Group RWTH Aachen University, Faculty 6, Germany FFV Workshop, 11.03.2011. Outline. Scenarios Distributed Coordination Function (DCF) in IEEE 802.11

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Provision of Multimedia Services in 802.11-based Networks

Provision of Multimedia Services in 802.11-based Networks. Colin Roby CMSC 681 Fall 2007. Overview. 1. Multimedia Streaming in 802.11 Networks. 2. 802.11e Mac Layer Enhancement. 3.Sustain Quality of Service in WLAN. 4. Challenges for Quality of Service Provision.

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Tree-Based Self-Initialization with Unique ID Assignment for Sensor Networks

Tree-Based Self-Initialization with Unique ID Assignment for Sensor Networks. By: ElMoustapha Ould-Ahmed-Vall For: ECE 8020 B Instructor: Gail Palmer April 7, 2005. Outline. Introduction: Sensor Network Motivation: Unique ID Assignment Proposed Algorithm Theoretical Analysis Future Work.

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CSMA Enhancement Suggestion

CSMA Enhancement Suggestion. Date: 2014-05-12. Authors:. Abstract. CSMA/CA mechanism used in 802.11 is good for low density WLAN deployment. However the use cases that HEW is to address are for high density deployment.

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TOWARD A COMPLETE CONTROL FRAMEWORK FOR ADAPTIVE CAPACITY ALLOCATION IN MOBILE DVB-RCS

TOWARD A COMPLETE CONTROL FRAMEWORK FOR ADAPTIVE CAPACITY ALLOCATION IN MOBILE DVB-RCS. Nedo Celandroni*, Franco Davoli°, Erina Ferro*, Alberto Gotta*, Raffaello Secchi *. *ISTI-CNR, Area della Ricerca del C.N.R., Via Moruzzi 1, I-56124 Pisa, Italy

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Service Discovery Proposal

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MAC Efficiency Analysis for HEW SG

MAC Efficiency Analysis for HEW SG . Authors:. Date: 2013-05-13. Dense deployments of 802.11 STAs were discussed in WNG SC as usage models for HEW SG (see reference list) Wireless Office Cellular offload (home, corporate, hotspot) Residential / apartment building Shopping mall

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HEW Evaluation Metrics

HEW Evaluation Metrics. Date : 2014-01-20. Authors:. Background. HEW Evaluation Metrics (1) Evaluation metrics is important to evaluate WLAN system performance and to achieve the goal of HEW

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