Question Points Score Total 100
|
|
- Allison Lee
- 5 years ago
- Views:
Transcription
1 THE UNIVERSITY OF HONG KONG FACULTY OF ENGINEERING DEPARTMENT OF COMPUTER SCIENCE CSIS 7304 The Wireless Internet and Mobile Computing (Midterm Examination) Date: July, 006 Time: 7:00pm 9:00pm Question Points Score Total 00 Student Name: Student Number: Candidates may use any calculator which fulfils the following criteria: (a) it should be self-contained, silent, battery-operated and pocket-sized; (b) it should have numeral-display facilities only and should be used only for the purpose of calculation; (c) it should not have any printing device, alphanumeric keyboard, or graphic display; and (d) it should not contain any recorded data or program. It is the candidate s responsibility to ensure that the calculator operates satisfactorily and the candidate must record the name and type of the calculator on the front page of the examination scripts. Lists of permitted/prohibited calculators will not be made available to candidates for reference, and the onus will be on the candidate to ensure that the calculator used will not be in violation of the criteria listed above. Answer ALL questions. This examination question/answer booklet has 6 pages. Copyright 006 by Dr. Ka-Cheong Leung. All rights reserved. CSIS 7304 Midterm Examination Page
2 . (6 points) Discuss two means to mitigate narrowband interference. Compare the complexity of these solutions. ) Dynamic frequency selection (DFS): Senders can sense the medium for interference and choose a frequency range with no or little interference. Network operators can also use this scheme to dynamically assign frequencies to cells in mobile phone systems. DFS has a relatively low complexity as the selected frequencies do not change between two successive assignments and during a call. ) Direct sequence spread spectrum (DSSS): Data is XORed with a chipping sequence resulting in a spread signal. The signal is spread over a large spectrum, and, thus, narrowband interference only destroys a small fraction of the signal. DSSS has high complexity as it requires more powerful receivers to extract the original signal from the mixture of spread signals. + Max. 6 3) Frequency hopping spread spectrum (FHSS): The sender and receiver stay on one channel for a certain time and then hop to another channel of a different frequency. Slow hopping schemes transmit several symbols per frequency. Fast hopping schemes transmit a symbol over several frequencies. These schemes may avoid frequencies with interference most of the time with a certain probability. FHSS has medium complexity as time synchronization of devices is necessary. + + Max. 6 Remark: Any of the above 3 approaches. CSIS 7304 Midterm Examination Page
3 . (a) (8 points) Give four advantages of cellular systems with small cells. ) Higher capacity / Supporting a higher number of users / Allowing frequency reuse ) Less transmission power needed 3) Interference / transmission dealt with by base stations locally 4) More robust against component failures / due to decentralization (b) (6 points) Give three problems encountered by cellular systems with small cells. ) Complex infrastructure needed to connect all base stations ) Handover needed when a mobile station moves from one cell to another 3) Frequency planning needed to avoid interference between transmitters using the same frequencies (c) (5 points) Discuss how is space division multiplexing (SDM) typically realized and combined with frequency division multiplexing (FDM)? Explain your answer. Typically, each cell realizing SDM holds a certain number of frequency bands. Neighbouring cells in the same cluster apply FDM and use disjointed set of frequencies / are not allowed to use the same frequencies so as to minimize interference. (d) (6 points) How does dynamic channel allocation (DCA) influence the frequencies available in other cells? A system applying DCA dynamically allocates frequencies depending on the current load. It can react upon sudden increase in traffic by borrowing capacity from other cells. However, the borrowed frequency must be blocked in neighbouring cells. CSIS 7304 Midterm Examination Page 3
4 3. (a) (4 points) Distinguish between frequency division duplex (FDD) and time division duplex (TDD). In FDD, mobile station to base station (uplink) and base station to mobile station (downlink) are separated using different frequencies. In TDD, uplink and downlink are assigned with different time slots using the same frequency. (b) (4 points) Discuss how guard spaces are realized between users in CDMA. The guard space between a pair of users in CDMA systems is the orthogonality between their spreading codes. The lower the correlation between any pair of spreading codes is, the better is the user separation. (c) (0 points) In GSM, the periodic pattern of 6 slots occurs in all TDMA frames with a traffic channel (TCH). 4 out of 6 physical slots are used for user data transmission. Each normal burst used for data transmission carries up to 4 bits of user data and is repeated every 4.65 ms. Compute the maximum data rate (in 3 significant figures) for user traffic supported by a TCH. Maximum user data rate required Total number of bits carried per 6 physical slots = Total time elapsed per 6 physical slots 4 4 = kbps M M A + A A + A A + A CSIS 7304 Midterm Examination Page 4
5 4. (a) (6 points) Give the full names and abbreviations of all key components of the operation subsystem (OSS) in a GSM system. ) Operation and maintenance center (OMC) ) Authentication center (AuC) 3) Equipment identity registry (EIR) (b) (4 points) What multiplexing schemes are used in GSM and for what purpose? ) Space division multiplexing (SDM): Operators design the cell layout, place base stations and reuse frequencies according to certain cluster patterns. ) Frequency division multiplexing (FDM): Regulation authorities assign channels to operators. Operators assign channels to base stations. Base stations assign a certain channel to a terminal during data transmission. 3) Time division multiplexing (TDM): Base stations assign a time slot or several time slots to a terminal for transmission. + CSIS 7304 Midterm Examination Page 5
6 5. ( points) Discuss in detail five common handover types that can occur in a combined UMTS/GSM network when a user equipment (UE) moves within a 3G UMTS network and from a 3G UMTS network into a G GSM network. ) Intra node B, intra RNC handover: A UE moves from one antenna of a node B to another antenna of the same node B. The node B performs softer handover (combining and splitting of data streams). ) Inter node B, intra RNC handover: A UE moves from one node B to another node B. The responsible radio network controller (RNC) supports soft handover by combining and splitting data. 3) Inter RNC handover: A UE moves from one node B to another node B with different RNCs. The internal inter RNC handover, which is a soft handover, is not visible for the core network (CN) so that the previously responsible RNC acts as a serving RNC (SRNC) and the newly responsible RNC becomes a drift RNC (DRNC). The external inter RNC handover, which is a hard handover, occurs when a relocation of the controlling RNC takes place. 4) Inter MSC handover: A UE moves from one MSC to another MSC so that a hard handover of the connection is performed. 5) Inter system handover: A UE moves from a 3G UMTS network into a G GSM network resulting in a hard handover Remark: 5 handover types (0 points); further discussion (max. points) END OF PAPER CSIS 7304 Midterm Examination Page 6
Multiple Access Techniques for Wireless Communications
Multiple Access Techniques for Wireless Communications Contents 1. Frequency Division Multiple Access (FDMA) 2. Time Division Multiple Access (TDMA) 3. Code Division Multiple Access (CDMA) 4. Space Division
More informationCellular systems 02/10/06
Cellular systems 02/10/06 Cellular systems Implements space division multiplex: base station covers a certain transmission area (cell) Mobile stations communicate only via the base station Cell sizes from
More informationAccess Methods and Spectral Efficiency
Access Methods and Spectral Efficiency Yousef Dama An-Najah National University Mobile Communications Access methods SDMA/FDMA/TDMA SDMA (Space Division Multiple Access) segment space into sectors, use
More informationAn Introduction to Wireless Technologies Part 2. F. Ricci
An Introduction to Wireless Technologies Part 2 F. Ricci Content Medium access control (MAC): FDMA = Frequency Division Multiple Access TDMA = Time Division Multiple Access CDMA = Code Division Multiple
More informationMultiple Access Schemes
Multiple Access Schemes Dr Yousef Dama Faculty of Engineering and Information Technology An-Najah National University 2016-2017 Why Multiple access schemes Multiple access schemes are used to allow many
More informationCDMA & WCDMA (UMTS) AIR INTERFACE. ECE 2526-WIRELESS & CELLULAR COMMUNICATION SYSTEMS Monday, June 25, 2018
CDMA & WCDMA (UMTS) AIR INTERFACE ECE 2526-WIRELESS & CELLULAR COMMUNICATION SYSTEMS Monday, June 25, 2018 SPREAD SPECTRUM OPTIONS (1) Fast Frequency Hopping (FFSH) Advantages: Has higher anti-jamming
More informationIntroduction to Wireless and Mobile Networking. Hung-Yu Wei g National Taiwan University
Introduction to Wireless and Mobile Networking Lecture 3: Multiplexing, Multiple Access, and Frequency Reuse Hung-Yu Wei g National Taiwan University Multiplexing/Multiple Access Multiplexing Multiplexing
More informationLevel 6 Graduate Diploma in Engineering Wireless and mobile communications
9210-119 Level 6 Graduate Diploma in Engineering Wireless and mobile communications Sample Paper You should have the following for this examination one answer book non-programmable calculator pen, pencil,
More informationAn Introduction to Wireless Technologies Part 2. F. Ricci 2008/2009
An Introduction to Wireless Technologies Part 2 F. Ricci 2008/2009 Content Multiplexing Medium access control Medium access control (MAC): FDMA = Frequency Division Multiple Access TDMA = Time Division
More informationMobile Computing. Chapter 3: Medium Access Control
Mobile Computing Chapter 3: Medium Access Control Prof. Sang-Jo Yoo Contents Motivation Access methods SDMA/FDMA/TDMA Aloha Other access methods Access method CDMA 2 1. Motivation Can we apply media access
More informationGSM and Similar Architectures Lesson 04 GSM Base station system and Base Station Controller
GSM and Similar Architectures Lesson 04 GSM Base station system and Base Station Controller 1 GSM network architecture Radio subsystem (RSS) Network subsystem (NSS) Operation subsystem (OSS) 2 RSS Consists
More informationMobile Communication Systems. Part 7- Multiplexing
Mobile Communication Systems Part 7- Multiplexing Professor Z Ghassemlooy Faculty of Engineering and Environment University of Northumbria U.K. http://soe.ac.uk/ocr Contents Multiple Access Multiplexing
More informationISHIK UNIVERSITY Faculty of Science Department of Information Technology Fall Course Name: Wireless Networks
ISHIK UNIVERSITY Faculty of Science Department of Information Technology 2017-2018 Fall Course Name: Wireless Networks Agenda Lecture 4 Multiple Access Techniques: FDMA, TDMA, SDMA and CDMA 1. Frequency
More informationChapter 7 Multiple Division Techniques for Traffic Channels
Introduction to Wireless & Mobile Systems Chapter 7 Multiple Division Techniques for Traffic Channels Outline Introduction Concepts and Models for Multiple Divisions Frequency Division Multiple Access
More informationETSI SMG#24 TDoc SMG2 898 / 97 Madrid, Spain December 15-19, 1997 Source: SMG2. Concept Group Delta WB-TDMA/CDMA: Evaluation Summary
ETSI SMG#24 TDoc SMG2 898 / 97 Madrid, Spain December 15-19, 1997 Source: SMG2 Concept Group Delta WB-TDMA/CDMA: Evaluation Summary Introduction In the procedure to define the UMTS Terrestrial Radio Access
More informationETSI SMG#24 TDoc SMG 903 / 97. December 15-19, 1997 Source: SMG2. Concept Group Alpha - Wideband Direct-Sequence CDMA: System Description Summary
ETSI SMG#24 TDoc SMG 903 / 97 Madrid, Spain Agenda item 4.1: UTRA December 15-19, 1997 Source: SMG2 Concept Group Alpha - Wideband Direct-Sequence CDMA: System Description Summary Concept Group Alpha -
More informationStructure of the Lecture
Structure of the Lecture Chapter 2 Technical Basics: Layer Methods for Medium Access: Layer 2 Channels in a frequency band Static medium access methods Flexible medium access methods Chapter 3 Wireless
More informationUNIK4230: Mobile Communications. Abul Kaosher
UNIK4230: Mobile Communications Abul Kaosher abul.kaosher@nsn.com Multiple Access Multiple Access Introduction FDMA (Frequency Division Multiple Access) TDMA (Time Division Multiple Access) CDMA (Code
More informationMobile Network Evolution Part 1. GSM and UMTS
Mobile Network Evolution Part 1 GSM and UMTS GSM Cell layout Architecture Call setup Mobility management Security GPRS Architecture Protocols QoS EDGE UMTS Architecture Integrated Communication Systems
More informationMultiplexing Module W.tra.2
Multiplexing Module W.tra.2 Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque, NM, USA 1 Multiplexing W.tra.2-2 Multiplexing shared medium at
More informationECS455: Chapter 4 Multiple Access
ECS455: Chapter 4 Multiple Access Asst. Prof. Dr. Prapun Suksompong prapun@siit.tu.ac.th 1 Office Hours: BKD 3601-7 Tuesday 9:30-10:30 Tuesday 13:30-14:30 Thursday 13:30-14:30 ECS455: Chapter 4 Multiple
More informationWireless Transmission & Media Access
Wireless Transmission & Media Access Signals and Signal Propagation Multiplexing Modulation Media Access 1 Significant parts of slides are based on original material by Prof. Dr.-Ing. Jochen Schiller,
More informationMedium Access Control. Wireless Networks: Guevara Noubir. Slides adapted from Mobile Communications by J. Schiller
Wireless Networks: Medium Access Control Guevara Noubir Slides adapted from Mobile Communications by J. Schiller S200, COM3525 Wireless Networks Lecture 4, Motivation Can we apply media access methods
More informationCS 6956 Wireless & Mobile Networks April 1 st 2015
CS 6956 Wireless & Mobile Networks April 1 st 2015 The SIM Card Certain phones contain SIM lock and thus work only with the SIM card of a certain operator. However, this is not a GSM restriction introduced
More informationWireless and mobile communication
Wireless and mobile communication Wireless communication Multiple Access FDMA TDMA CDMA SDMA Mobile Communication GSM GPRS GPS Bluetooth Content What is wireless communication? In layman language it is
More informationMedium Access Schemes
Medium Access Schemes Winter Semester 2010/11 Integrated Communication Systems Group Ilmenau University of Technology Media Access: Motivation The problem: multiple users compete for a common, shared resource
More informationMobile & Wireless Networking. Lecture 2: Wireless Transmission (2/2)
192620010 Mobile & Wireless Networking Lecture 2: Wireless Transmission (2/2) [Schiller, Section 2.6 & 2.7] [Reader Part 1: OFDM: An architecture for the fourth generation] Geert Heijenk Outline of Lecture
More informationMultiple Access System
Multiple Access System TDMA and FDMA require a degree of coordination among users: FDMA users cannot transmit on the same frequency and TDMA users can transmit on the same frequency but not at the same
More informationPage 1. Problems with 1G Systems. Wireless Wide Area Networks (WWANs) EEC173B/ECS152C, Spring Cellular Wireless Network
EEC173B/ECS152C, Spring 2009 Wireless Wide Area Networks (WWANs) Cellular Wireless Network Architecture and Protocols Applying concepts learned in first two weeks: Frequency planning, channel allocation
More informationIMT IMT-2000 stands for IMT: International Mobile Communications 2000: the frequency range of 2000 MHz and the year 2000
IMT-2000 IMT-2000 stands for IMT: International Mobile Communications 2000: the frequency range of 2000 MHz and the year 2000 In total, 17 proposals for different IMT-2000 standards were submitted by regional
More informationICT 5305 Mobile Communications. Lecture - 4 April Dr. Hossen Asiful Mustafa
ICT 5305 Mobile Communications Lecture - 4 April 2016 Dr. Hossen Asiful Mustafa Media Access Motivation Can we apply media access methods from fixed networks? Example CSMA/CD Carrier Sense Multiple Access
More informationRADIO SYSTEMS ETIN15. Lecture no: GSM and WCDMA. Ove Edfors, Department of Electrical and Information Technology
RADIO SYSTEMS ETIN15 Lecture no: 11 GSM and WCDMA Ove Edfors, Department of Electrical and Information Technology Ove.Edfors@eit.lth.se 1 Contents (Brief) history of mobile telephony Global System for
More informationGSM and WCDMA RADIO SYSTEMS ETIN15. Lecture no: Ove Edfors, Department of Electrical and Information Technology
RADIO SYSTEMS ETIN15 Lecture no: 11 GSM and WCDMA Ove Edfors, Department of Electrical and Information Technology Ove.Edfors@eit.lth.se 2015-05-12 Ove Edfors - ETIN15 1 Contents (Brief) history of mobile
More informationChapter 3 : Media Access. Mobile Communications. Collision avoidance, MACA
Mobile Communications Chapter 3 : Media Access Motivation Collision avoidance, MACA SDMA, FDMA, TDMA Polling Aloha CDMA Reservation schemes SAMA Comparison Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
More informationWireless Transmission in Cellular Networks
Wireless Transmission in Cellular Networks Frequencies Signal propagation Signal to Interference Ratio Channel capacity (Shannon) Multipath propagation Multiplexing Spatial reuse in cellular systems Antennas
More informationW-CDMA for UMTS Principles
W-CDMA for UMTS Principles Introduction CDMA Background/ History Code Division Multiple Access (CDMA) Why CDMA? CDMA Principles / Spreading Codes Multi-path Radio Channel and Rake Receiver Problems to
More informationWCDMA Basics Chapter 2 OBJECTIVES:
WCDMA Basics Chapter 2 This chapter is designed to give the students a brief review of the WCDMA basics of the WCDMA Experimental System. This is meant as a review only as the WCDMA basics have already
More informationT325 Summary T305 T325 B BLOCK 3 4 PART III T325. Session 11 Block III Part 3 Access & Modulation. Dr. Saatchi, Seyed Mohsen.
T305 T325 B BLOCK 3 4 PART III T325 Summary Session 11 Block III Part 3 Access & Modulation [Type Dr. Saatchi, your address] Seyed Mohsen [Type your phone number] [Type your e-mail address] Prepared by:
More informationMedium Access Control
CMPE 477 Wireless and Mobile Networks Medium Access Control Motivation for Wireless MAC SDMA FDMA TDMA CDMA Comparisons CMPE 477 Motivation Can we apply media access methods from fixed networks? Example
More informationMOBILE COMPUTING 4/8/18. Basic Call. Public Switched Telephone Network - PSTN. CSE 40814/60814 Spring Transit. switch. Transit. Transit.
MOBILE COMPUTING CSE 40814/60814 Spring 2018 Public Switched Telephone Network - PSTN Transit switch Transit switch Long distance network Transit switch Local switch Outgoing call Incoming call Local switch
More informationMultiple Access. Difference between Multiplexing and Multiple Access
Multiple Access (MA) Satellite transponders are wide bandwidth devices with bandwidths standard bandwidth of around 35 MHz to 7 MHz. A satellite transponder is rarely used fully by a single user (for example
More informationChapter 1 Acknowledgment:
Chapter 1 Acknowledgment: This material is based on the slides formatted by Dr Sunilkumar S. Manvi and Dr Mahabaleshwar S. Kakkasageri, the authors of the textbook: Wireless and Mobile Networks, concepts
More informationEEE 309 Communication Theory
EEE 309 Communication Theory Semester: January 2016 Dr. Md. Farhad Hossain Associate Professor Department of EEE, BUET Email: mfarhadhossain@eee.buet.ac.bd Office: ECE 331, ECE Building Part 08 Multiplexing
More informationTechnical Aspects of LTE Part I: OFDM
Technical Aspects of LTE Part I: OFDM By Mohammad Movahhedian, Ph.D., MIET, MIEEE m.movahhedian@mci.ir ITU regional workshop on Long-Term Evolution 9-11 Dec. 2013 Outline Motivation for LTE LTE Network
More informationBackground: Cellular network technology
Background: Cellular network technology Overview 1G: Analog voice (no global standard ) 2G: Digital voice (again GSM vs. CDMA) 3G: Digital voice and data Again... UMTS (WCDMA) vs. CDMA2000 (both CDMA-based)
More informationCommunication Systems GSM
Communication Systems GSM Computer Science Organization I. Data and voice communication in IP networks II. Security issues in networking III. Digital telephony networks and voice over IP 2 last to final
More informationChapter 2 Overview. Duplexing, Multiple Access - 1 -
Chapter 2 Overview Part 1 (2 weeks ago) Digital Transmission System Frequencies, Spectrum Allocation Radio Propagation and Radio Channels Part 2 (last week) Modulation, Coding, Error Correction Part 3
More informationCDMA - QUESTIONS & ANSWERS
CDMA - QUESTIONS & ANSWERS http://www.tutorialspoint.com/cdma/questions_and_answers.htm Copyright tutorialspoint.com 1. What is CDMA? CDMA stands for Code Division Multiple Access. It is a wireless technology
More informationChapter 2: Wireless Transmission. Mobile Communications. Spread spectrum. Multiplexing. Modulation. Frequencies. Antenna. Signals
Mobile Communications Chapter 2: Wireless Transmission Frequencies Multiplexing Signals Spread spectrum Antenna Modulation Signal propagation Cellular systems Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
More informationReti di Telecomunicazione. Channels and Multiplexing
Reti di Telecomunicazione Channels and Multiplexing Point-to-point Channels They are permanent connections between a sender and a receiver The receiver can be designed and optimized based on the (only)
More informationChannel partitioning protocols
Wireless Networks a.y. 2010-2011 Channel partitioning protocols Giacinto Gelli DIBET gelli@unina.it 1 Outline Introduction Duplexing techniques FDD TDD Channel partitioning techniques FDMA TDMA CDMA Hybrid
More informationLecture 3 Cellular Systems
Lecture 3 Cellular Systems I-Hsiang Wang ihwang@ntu.edu.tw 3/13, 2014 Cellular Systems: Additional Challenges So far: focus on point-to-point communication In a cellular system (network), additional issues
More informationDifference Between. 1. Old connection is broken before a new connection is activated.
Difference Between Hard handoff Soft handoff 1. Old connection is broken before a new connection is activated. 1. New connection is activated before the old is broken. 2. "break before make" connection
More informationInterference management Within 3GPP LTE advanced
Interference management Within 3GPP LTE advanced Konstantinos Dimou, PhD Senior Research Engineer, Wireless Access Networks, Ericsson research konstantinos.dimou@ericsson.com 2013-02-20 Outline Introduction
More informationUNIT 4 Spread Spectrum and Multiple. Access Technique
UNIT 4 Spread Spectrum and Multiple Access Technique Spread Spectrum lspread spectrumis a communication technique that spreads a narrowband communication signal over a wide range of frequencies for transmission
More informationChapter 8: GSM & CDAMA Systems
Chapter 8: GSM & CDAMA Systems Global System for Mobile Communication (GSM) Second Generation (Digital) Cellular System Operated in 900 MHz band GSM is also operated in 1800 MHz band and this version of
More informationWireless Network Pricing Chapter 2: Wireless Communications Basics
Wireless Network Pricing Chapter 2: Wireless Communications Basics Jianwei Huang & Lin Gao Network Communications and Economics Lab (NCEL) Information Engineering Department The Chinese University of Hong
More informationCommunications satellites are used to carry telephone, video, and data signals, and can use both analog and digital modulation techniques.
UNIT IV SATELLITE ACCESS 3.1 Modulation and Multiplexing: Voice, Data, Video : Communications satellites are used to carry telephone, video, and data signals, and can use both analog and digital modulation
More informationMd. Firoz Hossain Abu Shadat Mohammad Sohab
Mathematical Modelling of Call Admission Control in WCDMA Network Md. Firoz Hossain Abu Shadat Mohammad Sohab This thesis is presented as part of Degree of Master of Science in Electrical Engineering With
More informationLecture LTE (4G) -Technologies used in 4G and 5G. Spread Spectrum Communications
COMM 907: Spread Spectrum Communications Lecture 10 - LTE (4G) -Technologies used in 4G and 5G The Need for LTE Long Term Evolution (LTE) With the growth of mobile data and mobile users, it becomes essential
More informationMobile Comms. Systems. Radio Interface
Radio Interface Multiple Access Techniques MuAT (1/23) The transmission of bidirectional information in duplex systems (uplink - UL - and downlink - DL - channels) can be done by dividing in: frequency:
More informationWireless CommuniCation. unit 5
Wireless CommuniCation unit 5 V. ADVANCED TRANSCEIVER SCHEMES Spread Spectrum Systems- Cellular Code Division Multiple Access Systems- Principle, Power control, Effects of multipath propagation on Code
More informationModeling and Dimensioning of Mobile Networks: from GSM to LTE. Maciej Stasiak, Mariusz Głąbowski Arkadiusz Wiśniewski, Piotr Zwierzykowski
Modeling and Dimensioning of Mobile Networks: from GSM to LTE Maciej Stasiak, Mariusz Głąbowski Arkadiusz Wiśniewski, Piotr Zwierzykowski Modeling and Dimensioning of Mobile Networks: from GSM to LTE GSM
More information1. Introduction 1.2 Medium Access Control. Prof. JP Hubaux
1. Introduction 1.2 Medium Access Control Prof. JP Hubaux 1 Modulation and demodulation (reminder) analog baseband digital signal data digital analog 101101001 modulation modulation radio transmitter radio
More informationSNS COLLEGE OF ENGINEERING COIMBATORE DEPARTMENT OF INFORMATION TECHNOLOGY QUESTION BANK
SNS COLLEGE OF ENGINEERING COIMBATORE 641107 DEPARTMENT OF INFORMATION TECHNOLOGY QUESTION BANK EC6801 WIRELESS COMMUNICATION UNIT-I WIRELESS CHANNELS PART-A 1. What is propagation model? 2. What are the
More informationMobile and Broadband Access Networks Lab session OPNET: UMTS - Part 2 Background information
Mobile and Broadband Access Networks Lab session OPNET: UMTS - Part 2 Background information Abram Schoutteet, Bart Slock 1 UMTS Practicum CASE 2: Soft Handover Gain 1.1 Background The macro diversity
More informationUMTS: Universal Mobile Telecommunications System
Department of Computer Science Institute for System Architecture, Chair for Computer Networks UMTS: Universal Mobile Telecommunications System Mobile Communication and Mobile Computing Prof. Dr. Alexander
More informationLecture 7: Centralized MAC protocols. Mythili Vutukuru CS 653 Spring 2014 Jan 27, Monday
Lecture 7: Centralized MAC protocols Mythili Vutukuru CS 653 Spring 2014 Jan 27, Monday Centralized MAC protocols Previous lecture contention based MAC protocols, users decide who transmits when in a decentralized
More informationGTBIT ECE Department Wireless Communication
Q-1 What is Simulcast Paging system? Ans-1 A Simulcast Paging system refers to a system where coverage is continuous over a geographic area serviced by more than one paging transmitter. In this type of
More informationICT 5305 Mobile Communications. Lecture - 3 April Dr. Hossen Asiful Mustafa
ICT 5305 Mobile Communications Lecture - 3 April 2016 Dr. Hossen Asiul Mustaa Advanced Phase Shit Keying Q BPSK (Binary Phase Shit Keying): bit value 0: sine wave bit value 1: inverted sine wave very simple
More informationECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 9: Multiple Access, GSM, and IS-95
ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2003 Lecture 9: Multiple Access, GSM, and IS-95 Outline: Two other important issues related to multiple access space division with smart
More informationReferences. What is UMTS? UMTS Architecture
1 References 2 Material Related to LTE comes from 3GPP LTE: System Overview, Product Development and Test Challenges, Agilent Technologies Application Note, 2008. IEEE Communications Magazine, February
More informationMultiplexing. Rab Nawaz Jadoon DCS. Assistant Professor. Department of Computer Science. COMSATS Institute of Information Technology
Multiplexing Rab Nawaz Jadoon DCS Assistant Professor COMSATS IIT, Abbottabad Pakistan COMSATS Institute of Information Technology Mobile Communication Multiplexing Multiplexing describes how several users
More informationPERFORMANCE ANALYSIS OF DOWNLINK POWER CONTROL IN WCDMA SYSTEM
PERFORMANCE ANALYSIS OF DOWNLINK POWER CONTROL IN WCDMA SYSTEM Dr. M. Mahbubur Rahman, Md. Khairul Islam, Tarek Hassan-Al-Mahmud, A. R. Mahmud Abstract: WCDMA (Wideband Code Division Multiple Access) plays
More informationA Comparative Investigation on WCDMA Power Control Mechanisms
J. Basic. Appl. Sci. Res., 1(12)2693-2698, 2011 2011, TextRoad Publication ISSN 2090-4304 Journal of Basic and Applied Scientific Research www.textroad.com A Comparative Investigation on WCDMA Power Control
More informationDeveloping Mobile Applications
Developing Mobile Applications GSM networks 1 carriers GSM 900 MHz 890-915 MHz 935-960 MHz up down 200 KHz 200 KHz 25 MHz 25 MHz 2 frequency reuse A D K B J L C H E G I F A 3 Reuse patterns 4/12 4 base
More informationRRM Radio Networks Radio Resource Management in Area Coverage Networks
RRM Radio Networks Radio Resource Management in Area Coverage Networks Roberto Verdone roberto.verdone@unibo.it +39 051 20 93817 Office Hours: Monday 4 5 pm A.Y. 2017-18 Credits: 6 Mobile RAN Architecture:
More informationMobile & Wireless Networking. Lecture 4: Cellular Concepts & Dealing with Mobility. [Reader, Part 3 & 4]
192620010 Mobile & Wireless Networking Lecture 4: Cellular Concepts & Dealing with Mobility [Reader, Part 3 & 4] Geert Heijenk Outline of Lecture 4 Cellular Concepts q Introduction q Cell layout q Interference
More informationCHAPTER 13 CELLULAR WIRELESS NETWORKS
CHAPTER 13 CELLULAR WIRELESS NETWORKS These slides are made available to faculty in PowerPoint form. Slides can be freely added, modified, and deleted to suit student needs. They represent substantial
More informationMultiple Access Technique Lecture 8
Multiple Access Technique Lecture 8 Ir. Muhamad Asvial, MEng., PhD Center for Information and Communication Engineering Research Electrical Engineering Department University of Indonesia Kampus UI Depok,
More informationCommunications Theory and Engineering
Communications Theory and Engineering Master's Degree in Electronic Engineering Sapienza University of Rome A.A. 2018-2019 TDMA, FDMA, CDMA (cont d) and the Capacity of multi-user channels Code Division
More informationWireless Transmission:
Wireless Transmission: Physical Layer Aspects and Channel Characteristics Frequencies Signals Antenna Signal propagation Multiplexing Modulation Spread spectrum Cellular systems 1 Frequencies for communication
More informationCode Division Multiple Access.
Code Division Multiple Access Mobile telephony, using the concept of cellular architecture, are built based on GSM (Global System for Mobile communication) and IS-95(Intermediate Standard-95). CDMA allows
More informationMohammad Hossein Manshaei 1393
Mohammad Hossein Manshaei manshaei@gmail.com 1393 GSM 2 GSM Architecture Frequency Band and Channels Frames in GSM Interfaces, Planes, and Layers of GSM Handoff Short Message Service (SMS) 3 subscribers
More informationChapter 14. Cellular Wireless Networks
Chapter 14 Cellular Wireless Networks Evolu&on of Wireless Communica&ons 1901 Marconi: Trans-Atlantic wireless transmission 1906 Fessenden: first radio broadcast (AM) 1921 Detroit Police Dept wireless
More informationL1/L2 Handoff Considerations based on Universal Mobile Telecommunications System (UMTS)
L1/L2 Handoff Considerations based on Universal Mobile Telecommunications System (UMTS) Steve Dick InterDigital Communications Corporation 11 November 2002 1 UTRAN Architecture 11 November 2002 2002, InterDigital
More informationMultiple Access Techniques
Multiple Access Techniques Instructor: Prof. Dr. Noor M. Khan Department of Electrical Engineering, Faculty of Engineering, Mohammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +92
More informationWireless Telephony in Germany. Standardization of Networks. GSM Basis of Current Mobile Systems
Wireless Telephony in Germany Chapter 2 Technical Basics: Layer Methods for Medium Access: Layer 2 Chapter 3 Wireless Networks: Bluetooth, WLAN, WirelessMAN, WirelessWAN Mobile Telecommunication Networks:
More informationCellular Wireless Networks. Chapter 10
Cellular Wireless Networks Chapter 10 Cellular Network Organization Use multiple low-power transmitters (100 W or less) Areas divided into cells Each cell is served by base station consisting of transmitter,
More informationWireless Telecommunication Systems GSM as basis of current systems Enhancements for data communication: HSCSD, GPRS, EDGE UMTS: Future or not?
Chapter 2 Technical Basics: Layer 1 Methods for Medium Access: Layer 2 Chapter 3 Wireless Networks: Bluetooth, WLAN, WirelessMAN, WirelessWAN Mobile Networks: GSM, GPRS, UMTS Chapter 4 Mobility on the
More informationPage 1. Overview : Wireless Networks Lecture 9: OFDM, WiMAX, LTE
Overview 18-759: Wireless Networks Lecture 9: OFDM, WiMAX, LTE Dina Papagiannaki & Peter Steenkiste Departments of Computer Science and Electrical and Computer Engineering Spring Semester 2009 http://www.cs.cmu.edu/~prs/wireless09/
More informationA NEW EFFICIENT HANDOVER ALGORITHM FOR MBMS ENABLED 3G MOBILE CELLULAR NETWORKS UNIVERSITY OF CYPRUS
Master s Thesis A NEW EFFICIENT HANDOVER ALGORITHM FOR MBMS ENABLED 3G MOBILE CELLULAR NETWORKS Christopher Christophorou UNIVERSITY OF CYPRUS DEPARTMENT OF COMPUTER SCIENCE December 2005 UNIVERSITY OF
More informationMODULATION AND MULTIPLE ACCESS TECHNIQUES
1 MODULATION AND MULTIPLE ACCESS TECHNIQUES Networks and Communication Department Dr. Marwah Ahmed Outlines 2 Introduction Digital Transmission Digital Modulation Digital Transmission of Analog Signal
More informationContent. WCDMA BASICS HSDPA In general HSUPA
HSPA essentials Content WCDMA BASICS HSDPA In general HSUPA WCDMA Network Architecture USIM card Affected elements for HSPA GSM/WCDMA mobile Uu GSM/WCDMA mobile WCDMA mobile Uu Uu BTS BTS RAN Iub Iub RNC
More informationCHAPTER 2 WCDMA NETWORK
CHAPTER 2 WCDMA NETWORK 2.1 INTRODUCTION WCDMA is a third generation mobile communication system that uses CDMA technology over a wide frequency band to provide high-speed multimedia and efficient voice
More informationLecture #6 Basic Concepts of Cellular Transmission (p3)
November 2014 Integrated Technical Education Cluster At AlAmeeria E-716-A Mobile Communications Systems Lecture #6 Basic Concepts of Cellular Transmission (p3) Instructor: Dr. Ahmad El-Banna Agenda Duplexing
More informationChapter 2: Global System for Mobile Communication
Chapter 2: Global System for Mobile Communication (22 Marks) Introduction- GSM services and features, GSM architecture, GSM channel types, Example of GSM Call: GSM to PSTN call, PSTN to GSM call. GSM frame
More informationPersonal Communication System
Personal Communication System Differences Between Cellular Systems and PCS IS-136 (TDMA) PCS GSM i-mode mobile communication IS-95 CDMA PCS Comparison of Modulation Schemes Data Communication with PCS
More informationTRAINING OBJECTIVE. RF Planning Training Course will show the attendees how to plan, design and optimize networks efficiently.
TRAINING PROGRAM Diploma In Radio Network Planning DRNP Advance Diploma In Radio Network Planning - ADRNP Masters Diploma In Radio Network Planning - MDRNP TRAINING OBJECTIVE Our RF Planning Training is
More informationDOWNLINK AIR-INTERFACE...
1 ABBREVIATIONS... 10 2 FUNDAMENTALS... 14 2.1 INTRODUCTION... 15 2.2 ARCHITECTURE... 16 2.3 INTERFACES... 18 2.4 CHANNEL BANDWIDTHS... 21 2.5 FREQUENCY AND TIME DIVISION DUPLEXING... 22 2.6 OPERATING
More information