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Book IG 1800 British Telecom Rev A.Book
Notice to Users ©2003 2Wire, Inc. All rights reserved. This manual in whole or in part, may not be reproduced, translated, or reduced to any machine-readable form without prior written approval. 2WIRE PROVIDES NO WARRANTY WITH REGARD TO THIS MANUAL, THE SOFTWARE, OR OTHER INFORMATION CONTAINED HEREIN AND HEREBY EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE WITH REGARD TO THIS MANUAL, THE SOFTWARE, OR SUCH OTHER INFORMATION, IN NO EVENT SHALL 2WIRE, INC. BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES, WHETHER BASED ON TORT, CONTRACT, OR OTHERWISE, ARISING OUT OF OR IN CONNECTION WITH THIS MANUAL, THE SOFTWARE, OR OTHER INFORMATION CONTAINED HEREIN OR THE USE THEREOF. 2Wire, Inc. reserves the right to make any modification to this manual or the information contained herein at any time without notice. The software described herein is governed by the terms of a separate user license agreement. Updates and additions to software may require an additional charge. Subscriptions to online service providers may require a fee and credit card information. Financial services may require prior arrangements with participating financial institutions. © British Telecommunications Plc 2002. BTopenworld and the BTopenworld orb are registered trademarks of British Telecommunications plc. British Telecommunications Plc registered office is at 81 Newgate Street, London EC1A 7AJ, registered in England No. 180000. ___________________________________________________________________________________________________________________________ Owner’s Record The serial number is located on the bottom of your Intelligent Gateway. Record the serial number in the space provided here and refer to it when you call Customer Care. Serial Number:__________________________ Safety Information • Use of an alternative power supply may damage the Intelligent Gateway, and will invalidate the approval that accompanies the Intelligent Gateway. -
Mobile Devices 1 Development of Mobile Devices Berker Sönmez
Mobile Devices 1 Development of Mobile Devices Berker Sönmez Faculty of Computer and Informatics 040100101 Oğuz Onur Kul Faculty of Computer and Informatics 040100105 Erdem Emekligil Faculty of Computer and Informatics 150110702 English 201 Sueda Albayrak December 22, 2011 Mobile Devices 2 Thesis: The hardware, software and connection technologies of mobile devices have developed greatly in the recent years. I. Hardware A. Inside Components 1. Chips 2. Batteries B. Outside Components 1. Cameras 2. Touch sense technologies II. Software A. New operating systems 1. iOS 2. Android B. Functional applications 1. Medical applications 2. Game applications III. Connection technologies A. New generation wireless technologies 1. 802.11(Wifi) and 802.16(WiMax) 2. Bluetooth, IrDA and HomeRF B. Advanced communication protocols 1. 3G technology 2. 4G (LTE) technology Mobile Devices 3 Technology is one of the fastest growing entities in science. Day after day, many improvements are being made, many ideas and inventions are being added to this entity. In the recent years, mobile technology gained importance since people have started living in different places and it is important to provide communication among them. Mobile devices are small, portable equipments that are used to carry out various tasks without being obliged to stay in a certain place. In the recent years, the most popular mobile devices have been mobile phones since they have become everyday objects which people carry in their pockets to wherever they travel. Using mobile devices, it is possible to view e-mails, play games, read books and complete many other tasks on the go. Therefore, the importance of mobile phones can not be overlooked. -
Generating Signals for Wireless Lans, Part I: IEEE 802.11B
Products: SMIQ, AMIQ, WinIQSIM™, SMIQK16, AMIQK16 Generating Signals for Wireless LANs, Part I: IEEE 802.11b With Wireless Local Area Networks (WLAN) already entering the mass markets, generating signals to WLAN standards will become increasingly important. Signal sources are needed in R&D (or production) to test RF modules, to evaluate basic receiver functionality or when new designs are being evolved. This Application Note focuses on the most commonly used standard IEEE 802.11b. Topics covered include technical aspects of the physical layers as well as details on configuring available signal sources. Subject to change – Gernot Bauer 8/2002 – 1GP49_1E Generating Signals for WLANs, Part I: 802.11b Contents 1 Introduction to Wireless LAN Systems......................................................................................3 2 The IEEE 802.11 and 11b Standards ..........................................................................................5 2.1 The 802.11 and 11b PHY ....................................................................................................6 2.1.1 Defined Transmission Methods.................................................................................6 2.1.1.1 Low Rate Modulation with Barker Spreading................................................7 2.1.1.2 High Rate CCK Modulation...........................................................................8 2.1.1.3 High Rate PBCC Modulation ........................................................................9 2.1.2 The PLCP..................................................................................................................9 -
Structure of IEEE 802.11 Packets at Various Physical Layers
Appendix A: Structure of IEEE 802.11 Packets at Various Physical Layers This appendix gives a detailed description of the structure of packets in IEEE 802.11 for the different physical layers. 1. Packet Format of Frequency Hopping Spread-spectrum Physical Layer (FHSS PHY) The packet is made up of the following elements (Figure A.1): 1.1 Preamble It depends on the physical layer and includes: – Synch: a sequence of 80 bits alterning 0 and 1, used by the physical circuits to select the correct antenna (if more than one are in use), and correct offsets of frequency and synchronization. – SFD: start frame delimiter consists of a pattern of 16 bits: 0000 1100 1011 1101, used to define the beginning of the frame. 1.2 Physical Layer Convergence Protocol Header The Physical Layer Convergence Protocol (PLCP) header is always transmitted at 1 Mbps and carries some logical information used by the physical layer to decode the frame: – Length of word of PLCP PDU (PLW): representing the number of bytes in the packet, useful to the physical layer to detect correctly the end of the packet. – Flag of signalization PLCP (PSF): indicating the supported rate going from 1 to 4.5 Mbps with steps of 0.5 Mbps. Even though the standard gives the combinations of bits for PSF (see Table A.1) to support eight different rates, only the modulations for 1 and 2 Mbps have been defined. – Control error field (HEC): CRC field for error detection of 16 bits (or 32 bits). The polynomial generator used is G(x)=x16 + x12 + x5 +1. -
The Spirit of Wi-Fi
Rf: Wi-Fi_Text Dt: 09-Jan-2003 The Spirit of Wi-Fi where it came from where it is today and where it is going by Cees Links Wi-Fi pioneer of the first hour All rights reserved, © 2002, 2003 Cees Links The Spirit of Wi-Fi Table of Contents 0. Preface...................................................................................................................................................1 1. Introduction..........................................................................................................................................4 2. The Roots of Wi-Fi: Wireless LANs...................................................................................................9 2.1 The product and application background: networking ..............................................................9 2.2 The business background: convergence of telecom and computers? ......................................14 2.3 The application background: computers and communications ...............................................21 3. The original idea (1987 – 1991).........................................................................................................26 3.1 The radio legislation in the US .................................................................................................26 3.2 Pioneers .....................................................................................................................................28 3.3 Product definition ......................................................................................................................30 -
WIRELESS FIDELITY (Wi-Fi) BROADBAND NETWORK TECHNOLOGY: an OVERVIEW with OTHER BROADBAND WIRELESS NETWORKS
WIRELESS FIDELITY (Wi-Fi) BROADBAND NETWORK TECHNOLOGY: AN OVERVIEW WITH OTHER BROADBAND WIRELESS NETWORKS by Chris A. Nwabueze, M. Eng., MNSE, MNIEEE, MIEE. Silas A. Akaneme, M. Eng., MNSE, MNIEEE, MIEEE Dept. of Electrical/Electronic Engineering, Anambra State University, Uli. E-mail: [email protected]. ABSTRACT Wireless Fidelity (Wi-Fi) broadband network technology has made tremendous impact in the growth of broadband wireless networks. There exists today several Wi-Fi access points that allow employees, partners and customers to access corporate data from almost anywhere and anytime. Wireless broadband networks are expected to grow in terms of broadband speed and coverage, while Wi-Fi can be integrated with WiMAX networks to provide Internet connectivity to mobile Wi-Fi users. This paper explores the Wi-Fi broadband wireless network technology, its uses, advantages and disadvantages, comparison with other broadband wireless networks and integration with WiMAX network. Key Words: Broadband, Wireless Fidelity (Wi-Fi), World Wide Interoperability for Microwave Access (WiMAX), IEEE 802.11 standards. 1.0 INTRODUCTION 802.11a [12]. Wi-Fi is owned by the Wi-Fi Wi-Fi stands for “Wireless Fidelity” and Alliance which is a consortium of separate was used to describe Wireless LAN and independent companies agreeing to a (WLAN) products that are based on the set common interoperable products based IEEE 802.11 standards. Wi-Fi uses both on the family of IEEE 802.11 standards single carrier direct-sequence spread [11]. spectrum radio technology and multi-carrier Wi-Fi certifies products via a set of OFDM (Orthogonal Frequency Division established test procedures to establish Multiplexing) radio technology. -
A Comparison of HIPERLAN/2 and IEEE 802.11A Physical and MAC Layers
Doufexi, A. , Armour, SMD., Nix, AR., & Bull, DR. (2000). A comparison of HIPERLAN/2 and IEEE 802.11a physical and MAC layers. In IEEE Symposium of Communications and Vehicular Technology (SCVT 2000), Leuven, Belgium (pp. 14 - 20). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/SCVT.2000.923334 Peer reviewed version Link to published version (if available): 10.1109/SCVT.2000.923334 Link to publication record in Explore Bristol Research PDF-document University of Bristol - Explore Bristol Research General rights This document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/red/research-policy/pure/user-guides/ebr-terms/ A Comparison of HIPERLAN/2 and IEEE 802.11a Physical and MAC Layers Angela Doufexi, Simon Armour, Andrew Nix, David Bull Centre for Communications Research, University of Bristol, UK E-mail: A.Doufexi@ bristol.ac.uk, [email protected] Keywords: HIPERLAN/2, IEEE 802.1 1, Wireless LANs, OFDM Abstract This paper compares the HIPERLAN/2 and 802.11a standards and identifies their similarities and differences. At present, Wireless Local Area Networks (WLANs) The two standards differ primarily in the Medium Access supporting broadband multimedia communication are Control (MAC) [6,7] but some differences also occur in being developed and standardized. Two such standards are the physical layers. HIPERLAND, defined by ETSI BRAN and the IEEE’s 802.11a. These WLAN standards will provide data rates up The HIPERLh/2 radio network is defined in such a to 54 Mbps (in a channel spacing of 20 MHz) in the way that there are core independent Physical (I“)and 5.2GHz band. -
Wireless Networks Book
Wireless Networks Local and Ad Hoc Networks Ivan Marsic Department of Electrical and Computer Engineering and the CAIP Center Rutgers University Contents CHAPTER 1................................................................................................... INTRODUCTION ..............................................................................................................................1 1.1 Summary and Bibliographical Notes................................................................................................... 6 CHAPTER 2 THE RADIO CHANNEL.......................................................................1 2.1 Introduction........................................................................................................................................ 1 2.1.1 Decibels and Signal Strength ............................................................................................................ 4 2.2 Channel Implementation..................................................................................................................... 5 2.2.1 Transmission Rate ........................................................................................................................... 5 2.2.2 Symbols To Signals.......................................................................................................................... 6 2.2.3 Modulation ...................................................................................................................................... 6 2.2.4 Noise and Error -
Development of Wireless Local Area Networks in OECD Countries”, OECD Digital Economy Papers, No
Please cite this paper as: OECD (2003-04-16), “Development of Wireless Local Area Networks in OECD Countries”, OECD Digital Economy Papers, No. 71, OECD Publishing, Paris. http://dx.doi.org/10.1787/233145088433 OECD Digital Economy Papers No. 71 Development of Wireless Local Area Networks in OECD Countries OECD Unclassified DSTI/ICCP/TISP(2002)10/FINAL Organisation de Coopération et de Développement Economiques Organisation for Economic Co-operation and Development 16-Apr-2003 ___________________________________________________________________________________________ English - Or. English DIRECTORATE FOR SCIENCE, TECHNOLOGY AND INDUSTRY COMMITTEE FOR INFORMATION, COMPUTER AND COMMUNICATIONS POLICY Unclassified DSTI/ICCP/TISP(2002)10/FINAL Cancels & replaces the same document of 14 April 2003 Working Party on Telecommunication and Information Services Policies DEVELOPMENT OF WIRELESS LOCAL AREA NETWORKS IN OECD COUNTRIES English - Or. English JT00142903 Document complet disponible sur OLIS dans son format d'origine Complete document available on OLIS in its original format DSTI/ICCP/TISP(2002)10/FINAL FOREWORD In December 2002, this report was presented to the Working Party on Telecommunications and Information Services Policy (TISP). It was recommended to be made public by the Committee for Information, Computer and Communications Policy in March 2003. The report was prepared by Mr. Atsushi Umino of the OECD's Directorate for Science, Technology and Industry. It is published on the responsibility of the Secretary-General of the OECD. Copyright OECD, 2003 Applications for permission to reproduce or translate all or part of this material should be made to: Head of Publications Service, OECD, 2 rue André-Pascal, 75775 Paris Cedex 16, France. 2 DSTI/ICCP/TISP(2002)10/FINAL TABLE OF CONTENTS MAIN POINTS............................................................................................................................................ -
Communications Technology Assessment for the Unmanned Aircraft System (UAS) Control and Non-Payload Communications (CNPC) Link
NASA/CR—2014-216675 Communications Technology Assessment for the Unmanned Aircraft System (UAS) Control and Non-Payload Communications (CNPC) Link Steven C. Bretmersky MTI Systems, Inc., Cleveland, Ohio William D. Bishop Verizon Federal Network Systems, LLC., Arlington, Virginia Justin E. Dailey MTI Systems, Inc., Cleveland, Ohio Christine T. Chevalier Vantage Partners, LLC, Brook Park, Ohio June 2014 NASA STI Program . in Profi le Since its founding, NASA has been dedicated to the • CONFERENCE PUBLICATION. Collected advancement of aeronautics and space science. The papers from scientifi c and technical NASA Scientifi c and Technical Information (STI) conferences, symposia, seminars, or other program plays a key part in helping NASA maintain meetings sponsored or cosponsored by NASA. this important role. • SPECIAL PUBLICATION. Scientifi c, The NASA STI Program operates under the auspices technical, or historical information from of the Agency Chief Information Offi cer. It collects, NASA programs, projects, and missions, often organizes, provides for archiving, and disseminates concerned with subjects having substantial NASA’s STI. The NASA STI program provides access public interest. to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Reports • TECHNICAL TRANSLATION. English- Server, thus providing one of the largest collections language translations of foreign scientifi c and of aeronautical and space science STI in the world. technical material pertinent to NASA’s mission. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which Specialized services also include creating custom includes the following report types: thesauri, building customized databases, organizing and publishing research results. • TECHNICAL PUBLICATION. -
Lecture 2 Physical Layer - Transmission Media
9/17/2013 DATA AND COMPUTER COMMUNICATIONS Lecture 2 Physical Layer - Transmission Media Mei Yang Based on Lecture slides by William Stallings 1 OVERVIEW transmission medium is the physical path between transmitter and receiver guided - wire / optical fiber unguided - wireless characteristics and quality determined by medium and signal in unguided media - bandwidth produced by the antenna is more important in guided media - medium is more important key concerns are data rate and distance 2 CpE400/ECG600 Spring 2013 1 9/17/2013 DESIGN FACTORS DETERMINING DATA RATE AND DISTANCE bandwidth • higher bandwidth gives higher data rate transmission impairments • impairments, such as attenuation, limit the distance interference • overlapping frequency bands can distort or wipe out a signal number of receivers • more receivers introduces more attenuation 3 ELECTROMAGNETIC SPECTRUM 4 CpE400/ECG600 Spring 2013 2 9/17/2013 TRANSMISSION CHARACTERISTICS OF GUIDED MEDIA Frequency Typical Typical Repeater Range Attenuation Delay Spacing Twisted pair 0 to 3.5 kHz 0.2 dB/km @ 50 µs/km 2 km (with 1 kHz loading) Twisted pairs 0 to 1 MHz 0.7 dB/km @ 5 µs/km 2 km (multi-pair 1 kHz cables) Coaxial cable 0 to 500 MHz 7 dB/km @ 4 µs/km 1 to 9 km 10 MHz Optical fiber 186 to 370 0.2 to 0.5 5 µs/km 40 km THz dB/km 5 TRANSMISSION CHARACTERISTICS OF GUIDED MEDIA 6 CpE400/ECG600 Spring 2013 3 9/17/2013 TWISTED PAIR Twisted pair is the least expensive and most widely used guided transmission medium. • consists of two insulated copper wires arranged in a regular spiral pattern • a wire pair acts as a single communication link • pairs are bundled together into a cable • most commonly used in the telephone network and for communications within buildings 7 TWISTED PAIR -TRANSMISSION CHARACTERISTICS analog digital limited: needs can use amplifiers either analog distance every 5km to or digital 6km signals needs a repeater bandwidth every 2km to (1MHz) susceptible to 3km interference and data rate (100MHz) noise 8 CpE400/ECG600 Spring 2013 4 9/17/2013 UNSHIELDED VS. -
HIPERSIM: a Sense Range Distinctive Simulation Environment for Hiperlan Systems
This is a repository copy of HIPERSIM: A Sense Range Distinctive Simulation Environment for HiperLAN Systems. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/116437/ Version: Accepted Version Article: Papadimitriou, G.I., Lagkas, T.D. orcid.org/0000-0002-0749-9794 and Pomportsis, A.S. (2003) HIPERSIM: A Sense Range Distinctive Simulation Environment for HiperLAN Systems. Simulation, 79 (8). pp. 462-481. ISSN 0037-5497 https://doi.org/10.1177/0037549703040235 Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version - refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher’s website. Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing [email protected] including the URL of the record and the reason for the withdrawal request. [email protected] https://eprints.whiterose.ac.uk/ HIPERSIM: A Sense Range Distinctive Simulation Environment for HiperLAN Networks G. I. Papadimitriou T. Lagkas A. S. Pomportsis Department of Informatics, Aristotle University, Box 888, 54124 Thessaloniki, Greece. Abstract This paper presents the simulator “HIPERSIM” which was developed and used to examine the behavior of HIPERLAN.