Ppt on wifi networking concepts

#citrt #RefreshCache Networking Basics Foundational Concepts Elliott Wood - Solerant.

#citrt #RefreshCache Networking Basics Foundational Concepts Elliott Wood - Solerant Basic Network Overview 7 Layers of a Network Switches Switches direct traffic to MAC Addresses MAC Addresses (0E:12:45:AB:23:C9) Every Network Device Has a UNIQUE MAC Address A /the network address and what part is the host address. /8 /16 /24 WIFI Router Home All In One Device WIFI AP Like a switch for WIFI WIFI Bridge Connects Wirelessly to another WIFI Bridge WIFI Controller Control Multiple AP’s and Bridges Home WIFI Low/


Home Networks & Connectivity. Lesson 1 - Home networking Objectives In this lesson you are learning about: reasons for having a home network wired and.

internet on the desktop PC on the TV in the lounge Which Type of Network? WiFi Ethernet Powerline Types of Network – Ethernet, Wireless or Powerline Ethernet – an Ethernet cable is the original way of connecting computers. /in some limited circumstances exemptions will apply. With processing, the definition is far wider than before. For example, it incorporates the concepts of obtaining, holding and disclosing. What is sensitive personal data? Sensitive personal data may not – in normal circumstances – be /


Slides for Chapter 7: Security From Coulouris, Dollimore and Kindberg Distributed Systems: Concepts and Design Edition 4 © Pearson Education 2005 1.

Slides for Chapter 7: Security From Coulouris, Dollimore and Kindberg Distributed Systems: Concepts and Design Edition 4 © Pearson Education 2005 1 Introduction 2 The role of cryptography Threats and attacks Securing electronic / IEEE 802.11 WEP 49 Case Studies 802.11 WiFi 50 Case Studies 802.11 WiFi The following deficiencies and design weaknesses were discovered soon after the standard was deployed: 1.The sharing of a single key by all users of a network renders the design weak in practice Solution: Use a/


WIDER 3 WiFi in Disaster and Emergency Response Anders Bäck Muhammad Ali Beyhan Kochali Xin Bai David Tlahuetl WiFi in Disaster and Emergency Response.

Firewall GSM Connectivity Central Database Management System WiFi in Disaster and Emergency Response Caching Server Concept WiFi in Disaster and Emergency Response Caching Server Operation WiFi in Disaster and Emergency Response Caching / not configured. Outside project scope. Central Database with LDAP WiFi in Disaster and Emergency Response Facilitation of user administration Services using Central Database for authentication – RADIUS (Network access) – Caching server (Internet access) – Instant Messaging/


1 CA169 Networks & Internet Lecturer & Co-ordinator

Generally CCK used to transmit header and payload, usually! Preamble/HeaderPayload 177 CCK & OFDM Max. 11Mbps Max. 54Mbps 178 WiFi Interoperability CSMACA will be used again. RTSCTS will be used Headers may be transmitter using CCK and payloads may use OFDM OFDM / message, these updates are made by all systems each time an ARP Request is transmitted on the network. This feature is exploited in a concept that is called gratuitous ARP. 236 ARP Vulnerabilities ARP may be used to redirect traffic intended for a/


P2pWeb Slide1Peer-To-Peer : Concept, Tools and Applications The p2pweb Project Low cost Peer to Peer solutions for high availability web hosting 19 Mai.

and Applications Webperf.org : sample graph (3) p2pWeb Slide34Peer-To-Peer : Concept, Tools and Applications Node architecture and security ADSL or Cable modem Ethernet router/firewall Optional Wifi access point Private Ethernet LAN Ethernet link Internet Security Mandatory Hardware router/firewall with NAT capabilities Internal private network using RFC 1918 IP address (192.168.x.y) No incoming traffic from the outside other/


21-06-0762-00-0000 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-06-0762-00-0000 Title: Ambient Networks Date Submitted: Sep, 19, 2006 Presented at IEEE.

Part of this includes information to support handover decisions Concept of an Ambient Network Information Service The triggering functionality is considered as a “context provider” 21-06-0762-00-0000 The Ambient Network Information Service Infrastructure L3 L2 Timeline today GSM RR-Mgmt “simple” voice service handover Timeline MIP (same device) 3G B’tooth WiFi “clunky” data service handover IP SIP, IMS (between devices/


ICND -1 Interconnecting Cisco Networking Devices Assembled By David Roberts Knowing what you DON’T know is more important than what you DO know. It takes.

have AdHoc AP’s on auto-connect anytime the SSID is seen after the first attempt. This particular “Free Public Wifi” is the most widely used SSID by thieves around the world. This SSID can be found everywhere from Africa to Europe/software.  Read the Chapters Module 4 – Exploring the Functions of Routing – Part 8 Routing Concepts: Split horizon Routing Concepts: Split horizon In computer networks, distance-vector routing protocols employ the split horizon rule which prohibits a router from advertising a route/


TinyOS – Time to ROLL (Routing over Low power and Lossy Networks)

Deployment Duty Cycle Deployment Reliability ETTX Where Did We Go Wrong? ETTX Internet – Networks of Networks Ethernet WiFi Serial links connect hosts and devices and other networks together Horizontally integrated vs Peripheral Interconnects USB, Firewire IDE / SCSI RS232,RS485 /other links or other PANs “Route-over”: IP routing within the PAN => ROLL ETTX Embedded IPv6 in Concept Structured Decomposition Retain strict modularity Some key cross-layer visibility IP Link ⇒ Always On Retain illusion even when /


Wireless Networking Technologies WLAN, WiFi Mesh and WiMAX

Routing and Transport Wireless MANs (WiMaX) 802.16 standard Trends Overlay networks Sridhar Iyer IIT Bombay Wireless Networks Wireless networks Access computing/communication services, on the move Wireless WANs Cellular Networks: GSM, GPRS, CDMA Satellite Networks: Iridium Wireless LANs WiFi Networks: 802.11 Personal Area Networks: Bluetooth Wireless MANs WiMaX Networks: 802.16 Mesh Networks: Multi-hop WiFi Adhoc Networks: useful when infrastructure not available Sridhar Iyer IIT Bombay Limitations of the/


Skills: none Concepts: wired hardware characteristics, wireless hardware characteristics (frequency and power), modulation schemes This work is licensed.

under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. The physical layer Where does this topic fit? Internet concepts – Applications – Technology (communication) – Implications Internet skills – Application development – Content creation – User skills The physical/ mentioned two wired technologies, what were they? 2.WiFi is commonly used for wireless network links. Can you think of other wireless technologies that are used for network links? 3.In our modulation example, the AM /


Communication Networks A Second Course Jean Walrand Department of EECS University of California at Berkeley.

p 1 +p 2 ) C1C1 C2C2 A game between two providers Different solution concepts may apply, depend on actual implementation Nash game mostly suited for large networks Provider 1 Provider 2 Nash Game: Result 1.Bottleneck providers get larger share of /Musacchio Wi-Fi Pricing Motivation Motivation Web-Browsing File Transfer Joint work with John Musacchio Motivation Path to Universal WiFi Access Massive Deployment of 802.11 base stations for private LANs Payment scheme might incentivize base station owners to /


Dr. Igor Santos.  Introduction to Wi-Fi networks  Encryption  WEP  WPA  Vulnerabilities  Attacks  Setting up a secure Wi-Fi network  Captive Portals.

NOT THE SAME as promiscuous mode ▪ Promiscuous : in LAN networks, connected ▪ Monitor: in WiFi networks, not connected ▪ Not all cards support monitor mode ▪ http/WiFi card in Master mode 12  Functionalities  They manage the physical media  They selectively retransmit data  They may have additional services ▪ DHCP ▪ Remote management (web, telnet, ssh) ▪ IP, MAC, etc.. filtering 13  Concepts  BSSID (Basic Service Set Identifier) ▪ Unique address that identifies the AP that creates the wireless network/


Submission doc.: IEEE 802.11-16/0436r0 March 2016 Nikola Serafimovski, pureLiFiSlide 1 LiFi: Concept, Use-cases and Progress Date: 2016-03-14 Authors:

.Dobroslav Tsonev, Stefan Videv, and Harald Haas, "Towards a 100 Gb/s visible light wireless access network," Opt. Express 23, 1627-1637 (2015) 8.M. Ayyash, H. Elgala, A. Khreishah, V. Jungnickel, T. Little, S. Shao, M. Rahaim, D. Schulz, Coexistence of WiFi and LiFi towards 5G: Concepts, Opportunities, and Challenges, IEEE Communiations Magazine, Optical Communications Series, vol. 54, no. 2, pp. 64/


MITM753: Advanced Computer Networks Chapter 5 Wireless and Mobile Networks.

different forms – mobile phones, tablets, notebooks. Wireless and mobile are actually two different concepts. Wireless: connection between device and network is done through wireless medium. Mobile: device can move around. Both have their own/attenuation than microwave. Applications: AM and FM radio. UHF and VHF television. Mobile phones. Walkie-talkie. Wireless networks (WiFi, WiMAX). Infrared Use transmitters / receivers that modulate noncoherent infrared light. Requires line of sight. Does not penetrate /


Its Everywhere Point of Sale attacks ● The free WiFi is connected to the same DSL or cable service as the PoS computers ● Depending if this free WiFi.

at the list of available networks you can only click the properties tab on networks you have already connected to. Sniffing! ● Once anyone is on that WiFi network it becomes rather trivial to "sniff" out information flying around on that network ● This can be done passively/ can steal passwords, personal info and email credentials off your smart phone just as they would a laptop. ● Using the concept of a man in the middle attack the data coming from the phone can be re- routed to the attackers laptop where/


1: Web Services Architecture

design and implementation of 6LoWPAN networks. This document will cover the concepts of "Mesh Under" and "Route Over", 802.15.4 design issues such as operation with sleeping nodes, network components (both battery-and line-powered), addressing, and IPv4/IPv6 network connections. As a spin-off/ Port 10/100Base-T 1 Port WiBro Connection Manager WiBro Module WiBro Module, USB Type USIM Card Slot WiFi Device Driver WiFi Module 802.11 b/g, USB Type USB Host Device Driver Console RS-232 1 Port Debug Serial Port/


Redes Inalámbricas – Tema 1 General concepts

Featuring the Internet, 2nd edition. Addison-Wesley, July 2002 Redes Inalámbricas – Tema 1 General concepts Technologies Various types of wireless technologies WiMax WiFi Bluetooth Network telephony. Various generations: GSM  GPRS, EDGE; UMTS  HSDPA LTE Satellites: Satellites Geostationary /1,25 squared miles MIT Roofnet: Distribution of nodes and quality of the links guifi.net Public WiFi network deployed basically in Cataluña Other proposals Kingsbridge Link panOULU Meraki Fon http://www.kblink.co.uk//


Lecturer:Michael OGrady Course:MSc Ubiquitous & Multimedia Systems Unit:Context Sensitive Service Delivery Lecture: Wireless Network Structure.

Lecturer:Michael OGrady Course:MSc Ubiquitous & Multimedia Systems Unit:Context Sensitive Service Delivery Lecture: Wireless Network Structure Objectives zDescribe GSM zOutline the evolution of GSM to 3G zDescribe the implications for services of this evolution. zReview the Cellular Concept zIntroduce WiFi, Bluetooth and Satellite telephony zIntroduce Software Defined Radio History of GSM - I y1982Group Spéciale Mobile formed (origin of term GSM) y1897 Initial/


1 MSWiM 2004 Rational Behaviors in WiFi Hotspots and in Ad Hoc Networks Jean-Pierre Hubaux EPFL.

3 lines of code! 11 Proposed solution: DOMINO  DOMINO: System for Detection Of greedy behaviour in the MAC layer of WiFi public NetwOrks (Raya, Hubaux, Aad, Mobisys 2004)  Idea: monitor the traffic and detect deviations by comparing average values of observed users/ the output of the strategy function depends on the input (example: TFT) where y i stands for the input 29 Concept of dependency graph dependency: the benefit of each source is dependent on the behavior of its forwarders dependency loop 30 Nash /


Home connectivity Skills: none IT concepts: local area network (LAN), LAN connectivity options, home-to-Internet connectivity options, wired and wireless.

Wired (cat 5 cable) access point links To and from the Internet Wireless (WiFi) access point links To and from the Internet TV and music equipment will be networked To and from the Internet Typical home Internet access point Plugs for the Internet /Do you have WiFi connectivity within your home? Do you have wired connectivity within your home? Is your TV set connected to your home LAN? Is your music system connected to your home LAN? Home connectivity Skills: none IT concepts: local area network (LAN), LAN /


Access Network for Future Internet Deokjai Choi 2015. 3.

Ethernet 10bT 802.3y Ethernet 100bT 802.3ab Ethernet 1000bT 802.3an Ethernet 1G bT 802.11a WiFi 802.11b WiFi 802.11g WiFi 802.11n WiFi X3T9.5 FDDI Serial Modem GPRS ISDN DSL Sonet Internet Protocol (IP) Routing Transport (UDP/IP/ data rates -Low error rates  Many evolving and challenged networks do not confirm to the current Internet’s philosophy -Intermittent connectivity -Long or variable Delay -Asymmetric data rates -High error rates DTN Concept  Build upon the extended “bundling” architecture (an end-/


CSCI 599: Delivery of Continuous Media in Mobile Ad-Hoc Networks of Gaming Devices Shahram Ghandeharizadeh Computer Science.

Information Association Wireless Channels Constraints http://dblab.usc.edu Summary H2O and AutoMata concepts are technically feasible today: H2O and AutoMata concepts are technically feasible today:  Design of effective algorithms to manage resources and/own project or choose from one of my proposed projects:  Focus on data placement  Intelligent use of multiple WiFi networking cards 33% Project presentation 33% Project presentation  Write a paper describing your results & give an inclass presentation./


The Nuts and Bolts of Networks How Can You Use Networks to Your Advantage? Chapter 7.

card Extranet Global positioning system Home router Intranet Microwave communications media Network Interface card Network operating system Optical fiber cable Peer-to-peeer network WiFi Wired communications media Wireless communications media ©2003 The McGraw-Hill Companies Review of Concepts 1.The Eurostar Train System and Computer Networks 2.Moving Information From Here to There  If you were a song, how would you move from one computer/


CSci4211: Introduction1 Chapter 1: Introduction  What is a Network? What is Internet? Compared with postal service & telephone system  Services provided.

“what’s the time?” “I have a question” introductions network protocols: machines rather than humans all communication activity in Internet governed by protocols (why this concept is so important!!!) CSci4211: Introduction 55 Make sure Bob is / or tier-1 ISP IXPs or private peering Regional ISPs company access via WiFi hotspots Internet: “networks of networks”! Home users Internet eXcange Points Home users Internet structure: network of networks Roughly hierarchical At center: “tier-1” ISPs (e.g., Verizon, /


Software Defined Networking COMS 6998-8, Fall 2013 Instructor: Li Erran Li 6998-8SDNFall2013/

table version: 3 } Switch Y: { inport p1, outports: [p3] mods:...... } Y X Debugging networks A B Switch X WiFi AP Y WiFi AP Z 11/26/13 Software Defined Networking (COMS 6998-8) 13 Using ndb to debug common issues Reachability – Symptom: A is not able to / stage Relay stage Migration stage Relay stage Report stage 11/26/13 Software Defined Networking (COMS 6998-8) 54 Source: S. Shin, et al. Delayed Connection Migration Concept Delay Connection Migration until the data plane receives (a) data packet(s) Why/


By Mohammed Al-Saleh / JUST 1 Chapter 7 Security in Networks Security in Computing, 4 th Ed, Pfleeger Part 1: Threats in Networks.

authentication, access control, accountability, and assurance are the basis for network security, just as they have been in other settings. By Mohammed Al-Saleh / JUST 5 Chapter 7 Network Concepts Networks involve not only the pieces but also importantly the connections among/with the cable. By Mohammed Al-Saleh / JUST 30 Chapter 7 Wireless (WiFi) Wireless networking is becoming very popular, with good reason. With wireless (also known as WiFi), people are not tied to a wired connection they are free to roam/


Juniper Networks Simply Connected Workshop. Agenda 10h00 : Introduction Westcon Juniper Team 10h15 : Juniper WLAN Solution in depth 11h30 : WLAN technical.

réseau, web, postes clients, nomadisme…) Mobilité Disponibilité et optimisation des applications Conformité légale Wifi Notre entreprise Produits ● Services ● Formations Formations Nouveaux clients Nouveaux Projets Argumentation Architecture Offre commerciale Déploiement /13h30 : WLAN demo-time Ringmaster Demo SmartPass Demo 15h00 : Break 15h20 : Simply Connected Concept 16h00 : Q&A 16h15 : Network Drink - Closing Cocktail Juniper Wireless LAN Product Portfolio Access Points Best price performance, Mass /


Cellular Networks and Mobile Computing COMS 6998-7, Spring 2014 Instructor: Li Erran Li

S1-U S11 SGi HSS GTP UE PMIP EPC – Evolved Packet Core Non-3GPP Access (cdma2000, WiMax, WiFi) S2 PMIP Courtesy: Zoltán Turányi 41 Cellular Networks and Mobile Computing (COMS 6998-10) 3/7/14 Access Procedure Cell Search – Base station broadcasts synchronization /S5 eNodeB S1-CP MME S1-U S11 SGi HSS UE See more in: 23.107 QoS concept and architecture Courtesy: Zoltán Turányi 60 Cellular Networks and Mobile Computing (COMS 6998-10) Service Data Flow Bearers default bearer Service Data Flow dedicated bearer/


Enterprise Networks Jennifer Rexford COS 461: Computer Networks Lectures: MW 10-10:50am in Architecture N101

the cable is long enough to reach Would like to “rewire” the building in software – The resulting concept is a Virtual LAN (VLAN) 13 Example: Two Virtual LANs Red VLAN and Orange VLAN Switches forward /– Blue: traffic to the Internet 31 Three Internal Networks Campus Data Network – Connects dorms, academic and administrative buildings, campus WiFi, etc. Princeton Private Network – Environmental systems, power, security cameras, building locks VoIP Network – VoIP phones in data center, chemistry, neuroscience/


CCNA Course-2 AITSO CCNA Course -2. Cisco Packet Tracer Student Networking Knowledge and Skills Cisco Networking Academy CCNP IT Essentials: PC Hardware.

application some provided service (e.g., World Wide Web). 5. Processes: Software that runs on network devices in order to support the communication functions 6. Messages: Well-known applications. Includes telephone calls, e-mail, web pages, etc. jj Elements Of Network Basic Elements of Wireless Networks Every WiFi network consists of these four basic elements. The WLAN formation is formed from the following parts. Access/


Chapter 1 Introduction Computer Networks CN5E by Tanenbaum & Wetherall, © Pearson Education-Prentice Hall and D. Wetherall, 2011, modified by SJF 1.

Networks can be classified by their scale: ScaleType Examples VicinityPAN (Personal Area Network) »Bluetooth (e.g., headset) BuildingLAN (Local Area Network) »WiFi, Ethernet CityMAN (Metropolitan Area Network) » Cable, DSL CountryWAN (Wide Area Network) »Large ISP PlanetThe Internet (network of all networks) The Internet! Personal Area Network/. Wetherall, 2011, modified by SJF OSI: + Very influential model with clear concepts Models, protocols and adoption all bogged down by politics and complexity TCP/IP: /


CE881: Mobile and Social Application Programming Networking Simon M. Lucas.

user per device) – Social apps – Better connected apps Technology – RESTful APIs – Basic Network Connectivity – Simple sharing with Intents – WiFi Direct Benefits of Network Connected Apps For some Apps, essential (e.g. email, Facebook) Can boost functionality of /with friends – Check on status of Friends – Import their pictures and other data Exciting possibilities Facebook SDK Key Concepts UiLifecycleHelper – used to help manage lifecycle transitions Session: – Handle a login to Facebook – Use this to/


CCNA 640-802 kcc 2009 Version Network Concepts review (1/1) OSI review and example questions (1/2) LAN Fundamentals review (1/3 + 2/1) LAB #1 Connecting.

ops (Lab #4) (1/8, 1/10, 2/3) Routing Basics (review Lab #3) (1/14, 2/7) CCNA FastTrack CCNA FastTrack WAN Concepts (1/16, 1/17, 2/12, 2/13, 2/14) day review KCC June 2009 AGENDA session 2 Review (Lab #3 & 4) Routing Protocols /X function MDI function 1 Rx + Tx + 2 Rx - Tx - 3 Tx + Rx + 6 Tx - Rx - NOTE; PC’s, ip phones, WiFi APs, network printers & routers all have MDI ports (Media Dependant Interface), bridges, switches, hubs & aDSL switch ports have MDI-X (cross-over). Newer equipment has auto-polarity/


SHARKFEST ‘10 | Stanford University | June 14–17, 2010 Scripting Wifi Security Software Sharkfest 10 Mike Kershaw / Dragorn Aruba Networks / Kismet SHARKFEST.

SHARKFEST ‘10 | Stanford University | June 14–17, 2010 Scripting Wifi Security Software Sharkfest 10 Mike Kershaw / Dragorn Aruba Networks / Kismet SHARKFEST ‘10 Stanford University June 14-17, 2010 SHARKFEST ‘10 | Stanford University / me! SHARKFEST ‘10 | Stanford University | June 14–17, 2010 Yeah, but... Yeah, it wouldnt work... Except your browser has no concept of security domains Something cached in an insecure domain... Is still cached in a secure domain! SHARKFEST ‘10 | Stanford University | June 14–/


WiFi connectivity Skills: none IT concepts: LAN versus public coverage, WiFi evolution This work is licensed under a Creative Commons Attribution-Noncommercial-

. Goal: connect cashiers 1997 IEEE Goal: standard for local area networks CEO VP Finance VP Marketing CIO Organization Home Mobility on home and work LANs 2001: WiFi goes public HotelChatters sixth annual hotel wifi reportannual hotel wifi report Hotel wifi Would you stay in a hotel without wifi? ATT hotspots, 2009 WiFi connectivity Skills: none IT concepts: LAN versus public coverage, evolution of an invention This work is/


1Client Server Programming - Slide Figures /quotes from Andrew Tanenbaum Computer Networks book (Teacher Slides) 1 Client Server and Parallel Programming.

) RPC client/server Implement a simple distributed parallel algorithm 7Client Server Programming - Slide Figures /quotes from Andrew Tanenbaum Computer Networks book (Teacher Slides) Expected Learning Outcomes Students will get familiar with basic networking concepts, the basic structure and organization of networking Common types of networking paradigms, and common Internet applications and protocols Particular emphasis will be put on the prevalent client/server model, and its/


CSCI566 Computer Networking ©2011, MA Doman 1. Today – General Overview  Course Overview  Introduce basic concepts and vocabulary  Networking overview.

and analyzing its results.  Apply the scientific method  Analyze network system performance  Gain a more solid understanding of networking concepts ©2011 MA Doman 3 Course Methodology  Lecture  Concept overview  Algorithm/protocol examples  Homework exercises  To help /obstruction by objects  interference radio link types:  terrestrial microwave  e.g. up to 45 Mbps channels  LAN (e.g., WiFi)  11Mbps, 54 Mbps  wide-area (e.g., cellular)  3G cellular: ~ few Mbps  satellite  Kbps to 45Mbps /


Wireless Communications

PDU TCP/IP PDU GTP PDU SNDCP PDU Faruk Hadziomerovic: Wireless Communications and Services, SSST Fall 2009 CDMA concept Chip rate Spreading factor = chip_rate/data_rate. Senders Chip rate Spreading factor = chip_rate/data_rate. dB = 10 /Media domain MGC – Media Gateway Controller CSCF – Call State Control Function UTRAN Core Network Faruk Hadziomerovic: Wireless Communications and Services, SSST Fall 2009 WiFi (Wireless LAN) architecture* PCF (Point Cordination Function) or infrastructure mode Server Router /


1 Architecture and Protocol Design for Cognitive Radio Networks* Microsoft CR Summit, Jun 2008 Rutgers, The State University of New Jersey www.winlab.rutgers.edu.

Wifi radio CogNet Protocol: Validating GCP-based Spectrum Coordination on ORBIT (cont.) 12 CogNet Protocol: Beacon Format Beacon format: (extended form of CSCC) Short message, low-layer function Link weight/metric calculation: Estimate maximum supported data PHY rate Direct link weight (proportional to achievable link rate) MAC Idle Ratio 13 CogNet Protocol: Network/Suburban 20 meters ORBIT Radio Grid Office 30 meters Radio Mapping Concept for ORBIT Emulator 400-node Radio Grid Facility at WINLAB Tech Center /


頁眉 Network:The Future Jintong Lin 24 Oct 2009, BUPT 2017/3/31.

10Gb/s 10-Km 200-Km over air 200-Km over fiber 10-m over air Next Generation Integrated Optical and Wireless Access Networks WiFi 2.4GHz (802.11b/g) 5GHz (802.11a) WiMAX 2.5, 3.5GHz 10, 26GHz DoD Ku-band 11-18 /information traffic Great efforts are made in the progress of supportive technologies Various projects are carried out worldwide for the concept and framework of the future network An advanced network will be realized to meet the requirements for the future 2017/3/31 Thank You! Acknowledgement to: D./


Lent Term M/W/F 11-midday

layer technologies Wired Ethernet (aka 802.3) Wireless Ethernet (aka 802.11 WiFi) Topic 3 Link Layer: Introduction Some terminology: hosts and routers are nodes /3 Switches vs. Routers Summary both store-and-forward devices routers: network layer devices (examine network layer headers) switches are link layer devices routers maintain routing tables, / transmission. A B C D 145 Topic 3 145 Key Points No concept of a global collision Different receivers hear different signals Different senders reach different/


Cellular Networks Lecture 6 Paul Flynn.

expensive cells can be used to cover remote rural regions Cellular Concept with Sectors frequency re-use base station Hand-off The final obstacle in the development of the cellular network involved the problem created when a mobile subscriber moved from one / of 3-10 kilometers Capacities of up to 40 Mbps per channel Mobile network deployments of up to 15 Mbps, 3 km radius Builds on and Extends WiFi Technology Advantages of WiFi are: Easy to deploy, unlicensed spectrum, low cost Supports (limited) mobility/


Convergence of Future Passive Optical and Wireless Personal Area Networks for Triple Play Service Distribution Stuart Walker 1, Terry Quinlan 1, Mehmet.

metro node  >1024 splits  Bit rate both downstream/upstream 10Gbit/s  LR-PON not commercially available and is a research concept 28/04/2015 21:41:446 OLT ONU 1 ONU 2 ONU n OLT ONU 1 ONU 2 ONU n BMR 1 2 n/ characteristics of NxN AWG. 28/04/2015 21:41:4514  All multimedia sources are connected to each other using wifi network  Wireless sources are PC based servers, Wifi based media players, camcorder, cameras, connected via broadband to service providers  Wireless clients communicate using UWB with the /


Future Internet Architectures (FIA) And GENI

the 21st Century. Research should include intellectually distinctive ideas, driven by the requirement for long-range concepts unfettered by the current limitations of or the requirement for immediate application to the current Internet./ routing in edge network Network: Ad hoc, multiple wireless technologies – WiFi, WiMAX Evaluate routing with mobility, handoff, multi-homing Single Wireless Domain WiMAX AP Multi-homed device WiFi BTS Movement Handoff Cell tower Ad hoc network Required Testbed Infrastructure:/


NENA’s 11 th Annual Technical Development Conference A proposal to support E911 calls on Voice over IP Networks Martin Dawson – Nortel Networks.

How to support VoIP without impacting the emergency network? How to support VoIP without impacting the emergency network? Routing – the concept of a routing key (ESRK) can be reused. Routing – the concept of a routing key (ESRK) can be/ – longer term Location determination – longer term Advanced positioning for IP clients – WiFi triangulation, Assisted GPS Advanced positioning for IP clients – WiFi triangulation, Assisted GPS Mid-call position updates for fully mobile clients (already supported /


doc.: IEEE

, doc.: IEEE 802.15- doc.: IEEE 802.15- March 2015 High Level Concepts High speed - efficient use of Optical Bandwidth Bidirectional - to alleviate spectrum Networked & Mobile - user expectations of wireless technology Secure & Safe - Privacy, Cybersecurity /Seamless mobility support for heterogeneous wireless environments Multipoint multiuser support  positioning, low latency, handover, integration with WiFi Low latency: < 1ms Short response time for the “Tactile Internet” Car-to-X, Industrial environments/


Mobile and portable connectivity Skills: none IT concepts: mobile vs portable connectivity, connectivity options (WiFi, cellular and satellite), characteristics.

3.0 License. Where does this topic fit? Internet concepts –Applications –Technology (communication) –Implications Internet skills –Application development –Content creation (images) Mobile and portable Fixed Mobile Portable Mobile connectivity options WiFi Cellular Satellite WiFi connectivity Internet LAN Cellular connectivity Internet Cellular network Centered horiz. Satellite connectivity Dual mode is common Cellular WiFi Cellular WiFi Portable WiFi LAN with Cellular backhaul Where can you use each? How/


The Edge of IT ITEC-200 Fall 2006

200 Fall 2006 Topic 4: Telecommunications & Networks Professor J. Alberto Espinosa Agenda Learn the basics about telecommunications Introduction to networking concepts Roadmap Decision Support Distributed Collaboration Enterprise Collaboration /sight required (e.g., visible light, infrared) Wireless Technologies Examples: Wireless Telephony Wireless Ethernet and WiFi Microwave Antennas Bluetooth Infrared Radio Frequency Identifiers (RFID) Wireless Telephony Mobile units communicate with ground antennas/


Mission Statement  TRI-ADS intends to provide a network of display modules that display targeted information in a variety of locations. The modules will.

info, system efficiency trending, etc.  Module interaction Brian Weinstein Technical Allowances  Large-scale application requires 3G or 4G data transmission WiFi not feasible over large distances Amazon’s Kindle uses proposed network  Proof of Concept Using UCB Wireless WiFi acts as faux 3G/4G network Brian Weinstein Objectives  Receive, store, and display information based on the units environment, location, and outside stimulants  Use a standard/


Ads by Google