Analysis of Cellular Data Communication for Neighborhood Area Network for Smart Grid

Total Page:16

File Type:pdf, Size:1020Kb

Analysis of Cellular Data Communication for Neighborhood Area Network for Smart Grid ANALYSIS OF CELLULAR DATA COMMUNICATION FOR NEIGHBORHOOD AREA NETWORK FOR SMART GRID Harish Maiya B.E., Visveswaraiah Technological University, Karnataka, India, 2006 PROJECT Submitted in partial satisfaction of the requirements for the degree of MASTER OF SCIENCE in COMPUTER ENGINEERING at CALIFORNIA STATE UNIVERSITY, SACRAMENTO SPRING 2011 ANALYSIS OF CELLULAR DATA COMMUNICATION FOR NEIGHBORHOOD AREA NETWORK FOR SMART GRID A Project by Harish Maiya Approved by: __________________________________, Committee Chair Isaac Ghansah, Ph.D. __________________________________, Second Reader Fethi Belkhouche, Ph.D. ____________________________ Date ii Student: Harish Maiya I certify that this student has met the requirements for format contained in the University format manual, and that this project is suitable for shelving in the Library and credit is to be awarded for the Project. __________________________, Graduate Coordinator ________________ Suresh Vadhva, Ph.D. Date Department of Computer Engineering iii Abstract of ANALYSIS OF CELLULAR DATA COMMUNICATION FOR NEIGHBORHOOD AREA NETWORK FOR SMART GRID by Harish Maiya Infrastructure of Smart Grid system relies on communication between electricity producer and consumer domain. Consumer domain consists of Neighborhood Area Network which connects smart meters installed at homes or businesses of consumers, Home Area Network which connects all appliances at home to Utility AMI Network (on producer side). Few candidates or protocols considered for implementing Neighborhood Area Network (NAN) are Cellular communication, IEEE 802.11, 802.16, 802.15.4, Optical fiber network, Power line network. Project aims to provide an analysis on Cellular data communication protocol considering its different standards, implementation details, advantages, disadvantages, security issues, reliability, time critical communication, maintenance, power, and cost factors. Studies are conducted on standards in Cellular communication such as CDMA, GSM, (2G) UMTS, WCDMA (3G) and 4G protocols and gauge factors of bandwidth, coverage, and resource usage and identify effective and efficient way to implement NAN. Analysis on Short Message Service (SMS) which is preferred mode for communication in NAN is carried iv out. Project intends to identify potential issues which affect the confidentiality, integrity, and availability of information flow through cellular communication channel when it is implemented in the Smart Grid. Investigations are carried out on application of information security best practice(s) to NAN in Smart grid and to what extent they are applied. Comparisons are done on different candidate protocols for NAN and make few recommendations, identify few research areas and open issues if any. _______________________, Committee Chair Isaac Ghansah Ph.D. _______________________ Date v DEDICATION To my parents, teachers and friends vi ACKNOWLEDGEMENT I am grateful to all the people who have helped and guided me in successful completion of my Masters’ Project. My sincere thanks to the project supervisor Dr. Isaac Ghansah, for providing me the opportunity to work on Smart Grid and guiding me throughout the project. My heartfelt thanks to Dr. Kwai-Ting Lan for being second reader and providing me with invaluable inputs on revising my report. I am thankful to Dr. Suresh Vadhva for his invaluable support throughout my graduate program. Special thanks to my friends Arti Arora and Adithya Shreyas for helping me with their ideas and by reviewing my project report. I would like to thank my seniors and all my friends who have been there for me throughout this graduate program. I would take this opportunity to acknowledge and appreciate the efforts of California State University, Sacramento for providing the facilities and environment conducive for students to nurture their career. Most importantly I would like to thank my parents Suryanarayana, Radha, my sister Sowmya, and bro-in-law Vinay for their true love and moral support. vii TABLE OF CONTENTS Page Dedication .......................................................................................................................... vi Acknowledgement ............................................................................................................ vii List of Tables ...................................................................................................................... x List of Figures ……………………………………………………………………………xi Chapter 1. INTRODUCTION .......................................................................................................... 1 1.1. Traditional Grid .................................................................................................... 1 1.2. Need for Smart Grid ............................................................................................. 3 1.3. Smart Grid ............................................................................................................ 5 1.4. Neighborhood Area Network ............................................................................... 8 1.5. Scope of the Project............................................................................................ 11 2. REQUIREMENTS FOR NEIGHBORHOOD AREA NETWORK ............................. 12 3. CELLULAR COMMUNICATION .............................................................................. 19 3.1 Features and Standards ....................................................................................... 19 3.2 Candidates for Implementing NAN ................................................................... 22 3.2.1 Global System for Mobile Communications (GSM) ..................................... 22 3.2.2 GSM Core Network ....................................................................................... 26 3.2.3 CDMA One or IS-95 ..................................................................................... 40 3.2.4 3G Systems and UMTS (Universal Mobile Telecommunications System) .. 42 3.2.5 W-CDMA ...................................................................................................... 46 3.2.6 4G-LTE Advanced ......................................................................................... 47 4. SHORT MESSAGE SERVICE (SMS) IN CELLULAR COMMUNICATION ......... 50 4.1 Implementation Details ...................................................................................... 50 4.2 Vulnerability and Example Attacks ................................................................... 54 4.3 Counter Measures, Solutions.............................................................................. 56 5. GENERATION IN CELLULAR WIRELESS STANDARDS .................................... 59 viii 5.1 1G,2G,3G,4G ..................................................................................................... 59 5.1.1 Overview of Standards ................................................................................. 60 5.2 Evaluation of Parameters of Cellular Standards ................................................ 61 5.3 Security Issues and Mechanisms in Cellular Standards ..................................... 63 5.4 Wireless Application Protocol (WAP) ............................................................... 72 6. COMPARISON OF CANDIDATE NETWORK PROTOCOLS FOR NAN .............. 77 6.1 Introduction ........................................................................................................ 77 6.2 IEEE 802.11 ....................................................................................................... 78 6.3 IEEE 802.16 ....................................................................................................... 83 6.4 IEEE 802.15.4 .................................................................................................... 87 6.5 Power Line Communication............................................................................... 90 6.6 Optical Fiber Communication ............................................................................ 92 6.7 Wireless Mesh Networks ................................................................................... 93 6.8 Cellular Network Over Other Candidates .......................................................... 95 7. CONCLUSION ........................................................................................................... 102 7.1 Project Results .................................................................................................. 102 7.2 Challenges and Outstanding Works ................................................................. 104 7.3 Future Works and Potential Research Topics .................................................. 104 Appendix Glossary....................................................................................................... 105 References ....................................................................................................................... 109 ix LIST OF TABLES Page Table 1: Network Types, Coverage and Bandwidth ..................................................... 16 Table 2: IEEE 802.11 Standards and its Variations ...................................................... 79 Table 3: Summary of Technologies for NAN............................................................. 101 x LIST OF FIGURES Page Figure 1: Traditional Grid ............................................................................................... 2 Figure 2: Smart Grid ......................................................................................................
Recommended publications
  • Analysis of Server-Smartphone Application Communication Patterns
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Aaltodoc Publication Archive Aalto University School of Science Degree Programme in Computer Science and Engineering Péter Somogyi Analysis of server-smartphone application communication patterns Master’s Thesis Budapest, June 15, 2014 Supervisors: Professor Jukka Nurminen, Aalto University Professor Tamás Kozsik, Eötvös Loránd University Instructor: Máté Szalay-Bekő, M.Sc. Ph.D. Aalto University School of Science ABSTRACT OF THE Degree programme in Computer Science and MASTER’S THESIS Engineering Author: Péter Somogyi Title: Analysis of server-smartphone application communication patterns Number of pages: 83 Date: June 15, 2014 Language: English Professorship: Data Communication Code: T-110 Software Supervisor: Professor Jukka Nurminen, Aalto University Professor Tamás Kozsik, Eötvös Loránd University Instructor: Máté Szalay-Bekő, M.Sc. Ph.D. Abstract: The spread of smartphone devices, Internet of Things technologies and the popularity of web-services require real-time and always on applications. The aim of this thesis is to identify a suitable communication technology for server and smartphone communication which fulfills the main requirements for transferring real- time data to the handheld devices. For the analysis I selected 3 popular communication technologies that can be used on mobile devices as well as from commonly used browsers. These are client polling, long polling and HTML5 WebSocket. For the assessment I developed an Android application that receives real-time sensor data from a WildFly application server using the aforementioned technologies. Industry specific requirements were selected in order to verify the usability of this communication forms. The first one covers the message size which is relevant because most smartphone users have limited data plan.
    [Show full text]
  • Performance of VBR Packet Video Communications on an Ethernet LAN: a Trace-Driven Simulation Study
    9.3.1 Performance of VBR Packet Video Communications on an Ethernet LAN: A Trace-Driven Simulation Study Francis Edwards Mark Schulz edwardsF@sl .elec.uq.oz.au marksas1 .elec. uq.oz.au Department of Electrical and Computer Engineering The University of Queensland St. Lucia Q 4072 Australia Abstract medium term, we can expect that current LAN technolo- Provision of multimedia communication services on today’s gies will be utilized in the near term for packet transport of packet-switched network infrastructure is becoming increas- video applications [4,5, 61. Characterizing the performance ingly feasible. However, there remains a lack of information of current networks carrying video communications traffic is regarding the performance of multimedia sources operating therefore an important issue. This paper investigates packet in bursty data traffic conditions. In this study, a videotele- transport of real time video communications traffic, charac- phony system deployed on the Ethernet LAN is simulated, teristic of videotelephony applications, on the popular 10 employing high time-resolution LAN traces as the data traf- Mbit/s Ethernet LAN. fic load. In comparison with Poisson traffic models, the Previous work has established that Ethernet is capable of trace-driven cases produce highly variable packet delays, and supporting video communication traffic in the presence of higher packet loss, thereby degrading video traffic perfor- Poisson data traffic [6, 71. However, recent studies of high mance. In order to compensate for these effects, a delay time-resolution LAN traffic have observed highly bursty control scheme based on a timed packet dropping algorithm traffic patterns which sustain high variability over timescales is examined.
    [Show full text]
  • Communication Protocol for Schools
    Communication Protocol for Schools Communication plays a key role in creating and fostering strong, positive relationships between the school and the home. Communication is a two-way street; our schools share information with our families and community, and our families share information with our schools. The purpose of this document is to guide, manage and improve school-home communication by offering a standard format, structure and sequence for regular, ongoing communication. Communication Channels Communication can take place in a variety of formats. The message and the purpose of the communication can help determine which format is most appropriate. Generally, the more issues-driven and/or detailed the information is, the more direct the communication channel chosen should be. Communication channels include: Face-to-face communication – one-on-one meetings, School Council meetings, Parent-Student- Teacher interviews Telephone conversations Hard copy, written communication – letters sent home from the school, paper school newsletters Electronic communication – email, electronic newsletters, websites, social media When the communication requires a dialogue, such as bringing forward a question or concern or when a discussion is required on a particular topic, the preferred channels of communication are ones that allow for an immediate and ongoing interaction between the people involved. The best formats for this kind of communication are face-to-face conversations or telephone conversations. Schools and families are encouraged to use these direct channels of communication when a topic is complex or requires a dialogue. These more direct forms of communication also help us establish a personal connection, which helps build relationships that we don’t get in other forms of communication.
    [Show full text]
  • Voice Over Internet Protocol (Voip): a Brief Review
    © APR 2018 | IRE Journals | Volume 1 Issue 10 | ISSN: 2456-8880 Voice over Internet Protocol (VoIP): A Brief Review ANURAG K MADHESHIYA1, KIRAN S KALE2, SHIV K YADAV3, JIGNESHKUMAR R. VALVI4 1,2,3,4 Department of Electronics and Communication, SVNIT Surat, India Abstract -- VoIP stands for Voice over Inter Protocol. It is setting up calls, registering the calls, authenticating a communication protocol mainly used for voice and terminating the call. Protocol belonging to H.323 communication, data transfer and video calling. It is based family of protocol uses TCP and UDP connection for on packet transmission over internet network. Paul Baran transportation. For call registering and call signaling and other researchers developed the packet network in the H.225 protocol is used. For media session mid twentieth century. In 1973 Dany Cohen first demonstrated packet voice in flight simulator application. establishment and controlling H.245 is used. For Due to its digital nature it is easy to operate on this protocol. conferencing T.120 protocol is used [3]-[4]. Index Terms: MGCP, Packet, QoS, SIP I. INTRODUCTION Voice over Internet Protocol also known as Voice over IP and VoIP is a communication standard for transmission of voice signal, data transmission and video conferencing. Actually this technology follow packet switching. In packet switching first the input signal (voice, data, video) converted into digital form so other operation becomes simple after this we do encoding, compressing of digital data to make more secure transmission through channel. Then after this we transmit the signal over the channel. At receiver side we do reverse of it but it also require an addition block before receiver to store packets and reorder these packets because in packet switching different Figure 1: Call flow of H.323 packets follow different path so reaches in random manner.
    [Show full text]
  • A Novel WLAN Vehicle-To-Anything (V2X) Channel Access Scheme for IEEE 802.11P-Based Next-Generation Connected Car Networks
    applied sciences Article A Novel WLAN Vehicle-To-Anything (V2X) Channel Access Scheme for IEEE 802.11p-Based Next-Generation Connected Car Networks Jinsoo Ahn 1 , Young Yong Kim 1 and Ronny Yongho Kim 2,* 1 School of Electrical & Electronics Engineering, Yonsei University, Seoul 03722, Korea; [email protected] (J.A.); [email protected] (Y.Y.K.) 2 Department of Railroad Electrical and Electronic Engineering, Korea National University of Transportation, Gyeonggi 16106, Korea * Correspondence: [email protected]; Tel.: +82-31-460-0573 Received: 15 September 2018; Accepted: 29 October 2018; Published: 1 November 2018 Featured Application: V2X system for next-generation connected car networks. Abstract: To support a massive number of connected cars, a novel channel access scheme for next-generation vehicle-to-anything (V2X) systems is proposed in this paper. In the design of the proposed scheme, two essential aspects are carefully considered: backward compatibility and massive V2X support. Since IEEE 802.11p-based V2X networks are already being deployed and used for intelligent transport systems, next-generation V2X shall be designed considering IEEE 802.11p-based V2X networks to provide backward compatibility. Since all future cars are expected to be equipped with a V2X communication device, a dense V2X communication scenario will be common and massive V2X communication support will be required. In the proposed scheme, IEEE 802.11-based extension is employed to provide backward compatibility and the emerging IEEE 802.11ax standard-based orthogonal frequency-division multiple access is adopted and extended to provide massive V2X support. The proposed scheme is further extended with a dedicated V2X channel and a scheduled V2X channel access to ensure high capacity and low latency to meet the requirements of the future V2X communication systems.
    [Show full text]
  • An Evaluation Protocol for Picture Archiving and Communication System: a Systematic Review
    ORIGINAL PAPER An Evaluation Protocol for Picture Archiving and Communication System: a Systematic Review Mohsen S. Tabatabaei1, ABSTRACT Mostafa Langarizadeh1, Introduction: Picture archiving and communication system (PACS) serves to store, transmit, communi- Kamran Tavakol2 cate and manage medical images. A logical evaluation protocol assists to determine whether the system is technically, structurally and operationally fit. The purpose of this systematic review was to propose a 1Department of Health Information logical evaluation protocol for PACS, particularly useful for new hospitals and other healthcare institutions Management, School of Health Management and Information Sciences, Iran University of in developing countries. Methods and Materials: We systematically reviewed 25 out of 267 full-length Medical Sciences. Tehran, Iran articles, published between 2000 and 2017, retrieved from four sources: Science Direct, Scopus, PubMed 2School of Medicine, University of Maryland and Google Scholar. The extracted data were tabulated and reviewed successively by three independent Baltimore. Baltimore, MD, USA panels of experts that oversaw the design of this study and the process by which the PACS evaluation protocol was systematically developed. Results: The outcome data were ranked by expert panels and Corresponding author: Mohsen S. Tabatabaei, Tel: +98-990-188-0720. E-mail: [email protected] analyzed statistically, with the reliability established at 0.82 based on the Pearson’s correlation coefficient. The essential components and the best options to establish an optimal PACS were organized under nine main sections: system configuration; system network; data storage; data compression; image input; image doi: 10.5455/aim.2017.25.250-253 characteristics; image presentation; communication link; and system security, with a total of 20 compo- ACTA INFORM MED.
    [Show full text]
  • Internet of Things (Iot): Protocols White Paper
    INTERNET OF THINGS (IOT): PROTOCOLS WHITE PAPER 11 December 2020 Version 1 1 Hospitality Technology Next Generation Internet of Things (IoT) Security White Paper 11 December 2020 Version 1 About HTNG Hospitality Technology Next Generation (HTNG) is a non-profit association with a mission to foster, through collaboration and partnership, the development of next-generation systems and solutions that will enable hoteliers and their technology vendors to do business globally in the 21st century. HTNG is recognized as the leading voice of the global hotel community, articulating the technology requirements of hotel companies of all sizes to the vendor community. HTNG facilitate the development of technology models for hospitality that will foster innovation, improve the guest experience, increase the effectiveness and efficiency of hotels, and create a healthy ecosystem of technology suppliers. Copyright 2020, Hospitality Technology Next Generation All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the copyright owner. For any software code contained within this specification, permission is hereby granted, free-of-charge, to any person obtaining a copy of this specification (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the above copyright notice and this permission notice being included in all copies or substantial portions of the Software.
    [Show full text]
  • Topic Research Data Transmission Standards Over GSM/UMTS Networks
    Slavik Bryksin [email protected] CSE237a Fall 08 Topic research Data transmission standards over GSM/UMTS networks 1. Introduction There are a lot of emerging and existing standards that are used for data transmission over cellular networks. This paper is focused on the GSM/UMTS networks technologies that are marketed as 2G through 3G, their underlying technologies and concepts (channel access methods, duplexing, coding schemes, etc), data transmission rates, benefits and limitations. The generation that preceded 2G GSM was analog, whereas all following generations are digital. Generation labeling is mostly for marketing purposes, thus some technologies that existed in 2G are carried over and labeled 3G (i.e. EDGE versions), moreover, the timeline of adoption of the protocols and their inclusion under the umbrella of a certain generation might not align with the technology inception and certification. 2. (2G) Technologies 2.1. GSM (Global System for Mobile communications) GSM data transmission protocol is circuit switched with a fixed rate of 9.6Kbps and uses TDMA (Time Division Multiple Access) to assign static downlink and uplink timeslots for data.[16] The fact that data rate is fixed leads to inefficient usage of the available bandwidth due to the bursty network traffic.[1] 2.2. GPRS (General Packet Radio Service) GPRS standard is marketed as 2.5G and was the next step after circuit switched GSM standards. It is packet switched, which implies better bandwidth utilization, however packetization of data incurs the cost of extra information included in the packet, and the overhead of negotiation of transmission with the base station.
    [Show full text]
  • Device-To-Device Communications in LTE-Advanced Network Junyi Feng
    Device-to-Device Communications in LTE-Advanced Network Junyi Feng To cite this version: Junyi Feng. Device-to-Device Communications in LTE-Advanced Network. Networking and Internet Architecture [cs.NI]. Télécom Bretagne, Université de Bretagne-Sud, 2013. English. tel-00983507 HAL Id: tel-00983507 https://tel.archives-ouvertes.fr/tel-00983507 Submitted on 25 Apr 2014 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. N° d’ordre : 2013telb0296 Sous le sceau de l’Université européenne de Bretagne Télécom Bretagne En habilitation conjointe avec l’Université de Bretagne-Sud Ecole Doctorale – sicma Device-to-Device Communications in LTE-Advanced Network Thèse de Doctorat Mention : Sciences et Technologies de l’information et de la Communication Présentée par Junyi Feng Département : Signal et Communications Laboratoire : Labsticc Pôle: CACS Directeur de thèse : Samir Saoudi Soutenue le 19 décembre Jury : M. Charles Tatkeu, Chargé de recherche, HDR, IFSTTAR - Lille (Rapporteur) M. Jean-Pierre Cances, Professeur, ENSIL (Rapporteur) M. Jérôme LE Masson, Maître de Conférences, UBS (Examinateur) M. Ramesh Pyndiah, Professeur, Télécom Bretagne (Examinateur) M. Samir Saoudi, Professeur, Télécom Bretagne (Directeur de thèse) M. Thomas Derham, Docteur Ingénieur, Orange Labs Japan (Encadrant) Acknowledgements This PhD thesis is co-supervised by Doctor Thomas DERHAM fromOrangeLabs Tokyo and by Professor Samir SAOUDI from Telecom Bretagne.
    [Show full text]
  • Lora-Based Device-To-Device Smartphone Communication for Crisis Scenarios
    Jonas Höchst et al. LoRa-based Device-to-Device Smartphone Communication for Crisis Scenarios LoRa-based Device-to-Device Smartphone Communication for Crisis Scenarios Jonas Höchst Lars Baumgärtner University of Marburg, Germany Technical University of Darmstadt, Germany Technical University of Darmstadt, Germany [email protected] [email protected] Franz Kuntke Alvar Penning Technical University of Darmstadt, Germany University of Marburg, Germany [email protected] [email protected] Artur Sterz Bernd Freisleben University of Marburg, Germany University of Marburg, Germany Technical University of Darmstadt, Germany Technical University of Darmstadt, Germany [email protected] [email protected] ABSTRACT In this paper, we present an approach to facilitate long-range device-to-device communication via smartphones in crisis scenarios. Through a custom firmware for low-cost LoRa capable micro-controller boards, called rf95modem, common devices for end users can be enabled to use LoRa through a Bluetooth, Wi-Fi, or serial connection. We present two applications utilizing the flexibility provided by the proposed firmware. First, we introduce a novel device-to-device LoRa chat application that works a) on the two major mobile platforms Android and iOS and b) on traditional computers like notebooks using a console-based interface. Second, we demonstrate how other infrastructure-less technology can benefit from our approach by integrating it into the DTN7 delay-tolerant networking software. The firmware, the device-to-device chat application, the integration into DTN7, as well as the experimental evaluation code fragments are available under permissive open-source licenses. Keywords LoRa, Disaster Communication, Device-To-Device Communication, INTRODUCTION The communication technologies developed and deployed in the last decades are integral parts of our daily life and are used by mobile phones, computers, or smart applications in homes and cities.
    [Show full text]
  • Wireless Evolution •..••••.•.•...•....•.•..•.•••••••...••••••.•••.••••••.••.•.••.••••••• 4
    Department of Justice ,"'''''''''<11 Bureau of Investigation ,Operational Technology Division WIRELESS EVDLUTIDN IN THIS Iselil-it:: .. WIRELESS EVOLUTIDN I!I TECH BYTES • LONG TERM EVOLUTIQN ill CLDUD SERVICES • 4G TECHNOLOGY ill GESTURE-RECOGNITION • FCC ON BROADBAND • ACTIVITY-BASED NAVIGATION 'aw PUIi! I' -. q f. 8tH'-.1 Waa 8RI,. (!.EIi/RiW81 R.d-nl)) - 11 - I! .el " Ij MESSAGE FROM MANAGEMENT b7E he bou~~aries of technology are constantly expanding. develop technical tools to combat threats along the Southwest Recognizing the pathway of emerging technology is Border. a key element to maintaining relevance in a rapidly changing technological environment. While this The customer-centric approach calls for a high degree of T collaboration among engineers, subject matter experts (SMEs), proficiency is fundamentally important in developing strategies that preserve long-term capabilities in the face of emerging and the investigator to determine needs and requirements. technologies, equally important is delivering technical solutions To encourage innovation, the technologists gain a better to meet the operational needs of the law enforcement understanding of the operational and investigative needs customer in a dynamic 'threat' environment. How can technical and tailor the technology to fit the end user's challenges. law enforcement organizations maintain the steady-state Rather than developing solutions from scratch, the customer­ production of tools and expertise for technical collection, while centric approach leverages and modifies the technoloe:v to infusing ideas and agility into our organizations to improve our fit the customer's nFlFlrt~.1 ability to deliver timely, relevant, and cutting edge tools to law enforcement customers? Balancing these two fundamentals through an effective business strategy is both a challenge and an opportunity for the Federal Bureau of Investigation (FBI) and other Federal, state, and local law enforcement agencies.
    [Show full text]
  • Multiple Access Techniques for 4G Mobile Wireless Networks Dr Rupesh Singh, Associate Professor & HOD ECE, HMRITM, New Delhi
    International Journal of Engineering Research and Development e-ISSN: 2278-067X, p-ISSN: 2278-800X, www.ijerd.com Volume 5, Issue 11 (February 2013), PP. 86-94 Multiple Access Techniques For 4G Mobile Wireless Networks Dr Rupesh Singh, Associate Professor & HOD ECE, HMRITM, New Delhi Abstract:- A number of new technologies are being integrated by the telecommunications industry as it prepares for the next generation mobile services. One of the key changes incorporated in the multiple channel access techniques is the choice of Orthogonal Frequency Division Multiple Access (OFDMA) for the air interface. This paper presents a survey of various multiple channel access schemes for 4G networks and explains the importance of these schemes for the improvement of spectral efficiencies of digital radio links. The paper also discusses about the use of Multiple Input/Multiple Output (MIMO) techniques to improve signal reception and to combat the effects of multipath fading. A comparative performance analysis of different multiple access schemes such as Time Division Multiple Access (TDMA), FDMA, Code Division Multiple Access (CDMA) & Orthogonal Frequency Division Multiple Access (OFDMA) is made vis-à-vis design parameters to highlight the advantages and limitations of these schemes. Finally simulation results of implementing some access schemes in MATLAB are provided. I. INTRODUCTION 4G (also known as Beyond 3G), an abbreviation of Fourth-Generation, is used for describing the next complete evolution in wireless communications. A 4G system will be a complete replacement for current networks and will be able to provide a comprehensive and secure IP solution. Here, voice, data, and streamed multimedia can be given to users on an "Anytime, Anywhere" basis, and at much higher data rates than the previous generations [1], [2], [3].
    [Show full text]