Unit 2: Mobile Communication Systems Lecture 8, 9: Performance Improvement Techniques in Cellular Systems. Today s Lecture: Outline
|
|
- Paula Stevenson
- 5 years ago
- Views:
Transcription
1 Unit 2: Mobile Communication Systems Lecture 8, 9: Performance Improvement Techniques in Cellular Systems Today s Lecture: Outline Handover & Roaming Hard and Soft Handover Power Control Cell Splitting Sectorization 1
2 Learning Objectives Students will be able to answer: What is the difference between Handover & Roaming? How power control is helpful in cellular systems? How Cell splitting and Sectorization improves the cellular capacity of the system? Summary of Wireless Systems 2
3 Handover & Roaming Call handover (handoff in US) is the switching of on-going call to a different traffic channel (frequency/ time/code) Must be transparent, uninterrupted, infrequent and successful Handover inside cell 1 for performance or quality improvement Handover between cells 2 MS moves from one cell/bs within the same MSC (or operator) during an existing call. Handover & Roaming Roaming A MS is handed over to a service area (market) other than that from which the service has been subscribed Roaming MS moves from one cell to another cell with different MSC in the same 3 or different 4 network (?) Handover/Roaming: Involves identifying a new BS, allocate new channels for both voice/data and control signals associated with new BS. 3
4 Handover & Roaming Handover Scenario 4
5 Handover Scenario Types of Handover Hard Handover: Perform break before make make. Current channel with old BS is released before the new channel with new BS is setup (may cause call dropping). Remarks: Simple to implement. Cause a short interruption of communications. Used in TDMA/FDMA based systems (e.g., GSM, IS-136). 5
6 Types of Handover Soft Handover: Perform make before break break. New channel with new BS is setup in parallel with the current channel with old BS. Both channels (old and new) are used simultaneously for the communications. Remarks: Provide diversity to improve boundary conditions. No communication interruption during handover. Used in CDMA based systems (e.g., IS-95, WCDMA, CDMA2000). Methods for Reducing Handover Call Dropping Handover call dropping is less desirable compared to new call blocking. Handover calls are given higher priority than new calls in using network resources. Methods to reduce Handover call dropping: Handover queuing: If all channels are busy, handover calls will be placed in a buffer, unless the buffer is full. Handover reservation: A few channels, r, are reserved for handover calls. New calls will be blocked if number of free channels is <= r. 6
7 Power Control (PC) One of the limitation on cellular capacity is co- channel interference (CCI). To reduce CCI, power control could be used. Power Control: The concept is to increase/ decrease the transmitter power if it is lesser/more than enough. The idea is that no one will use enough power for transmission Power Control: Figure 2.8 7
8 Operation of Power Control (PC) MS/BS will estimate its received SIR on DL/UL transmission. If channel condition is good, then received SIR is better than required SIR. Thus, receiver (MS/ BS) will send a command to transmitter (BS/MS) to decrease the transmit power. If channel condition is bad, then received SIR is worse than required SIR. Thus, receiver (MS/ BS) will send a command to transmitter (BS/MS) to increase the transmit power. A single bit command is sent. Typically, 1/0 to decrease/ increase by about 1 db. Power Control (PC) How often PC command is sent is based on PC rate GSM is 2 Hz. IS-95 is 800 Hz. WCDMA is 1500 Hz. Advantages: PC not only helps extend the battery life of the device but also reduces the CCI to improve the cellular capacity. PC is specially important t to CDMA based cellular l networks because every user using the same frequency for transmission. May not be able to compensate the fast Rayleigh fading. 8
9 Cell Splitting When a cell reaches to its maximum capacity, one solution is to split large cell into several small cells to increase the capacity. Each Cell has its own BS and a corresponding reduction in Antenna Height and Transmit power. Cell Splitting 9
10 Cell Splitting Trasmitter Power Reduction 10
11 Sectorization Keep the cell radius but reduce the total co- channel interference by using directional antenna. Each cell is divided into 3 (6) sectors with (6 60 ) directional antennas at the BS. For N>=4 The number of co-channel cells is reduced from 6 to 2 (1). Each sector is assigned a 1/3 (1/6) of the available channel per cell. Sectorization For N = 3 The number of co-channel channel cells is reduced from 6 to 3 (2) for 120 (60 ) directional antenna Each sector is assigned a 1/3 (1/6) of the available channel per cell. SIR is improved thus cluster size is reduced. Number of handovers required? 11
12 120 Directional Antenna Co-Channel Reduction in 120 Directional Antennas (N>=4) 12
13 Co-Channel Reduction in 60 Directional Antennas (N>=4) A simple analysis for Directional Antennas 13
14 SIR (worst case) analysis for 120 Directional Antennas SIR (worst case) analysis for 120 Directional Antennas 14
15 Example What are the SIR (in db) for N = 7, 4 and 3 using 120 directional antenna cellular system? Repeat it for 60 directional antenna? Assume the path-loss exponent 4. Home Work! Using 120 directional antenna SIR 7 =? SIR 4 =? SIR 3 =? Using 60 directional antenna SIR 7 =? SIR 4 =? SIR 3 =? Reason to use Sectorization 15
16 Unit 2: Mobile Communication Systems Lecture 10: Overview of Cellular Traffic Engineering Lecture 7: Outline Definition of Traffic in Cellular Systems Trunked System Traffic Load Calculations Trunking Efficiency 16
17 Learning Objectives Students will be able to answer/learn: What are basic definitions iti of Traffic in Cellular System? What are Erlang B formula and Erlang C formulas? How Traffic load and Trunking efficiency in Cellular System is computed? Definitions 17
18 Definitions Examples 18
19 Traffic Load? Examples 19
20 Trunked System Two types of Trunked Systems: Blocked Calls Cleared (BCC) No queuing for call requests. The requesting user is granted a channel immediately if it is available. Otherwise, the user is blocked and free to try again. The grade of Service (GoS) for BCC is to find the blocking probability, P b, obtained by Erlang B formula. Blocked Calls Delayed (BCD) Queue for blocked call requests. A queue is to hold blocked calls. If no channel is available, the call is delayed until a channel is free. The grade of Service (GoS) for BCC is to find the P(delay>t), that a call is blocked after waiting for t seconds, obtained by Erlang C formula. Erlang B Formula 20
21 Erlang B Formula Erlang C Formula 21
22 Erlang C Formula 22
MOBILE COMMUNICATIONS (650520) Part 3
Philadelphia University Faculty of Engineering Communication and Electronics Engineering MOBILE COMMUNICATIONS (650520) Part 3 Dr. Omar R Daoud 1 Trunking and Grade Services Trunking: A means for providing
More informationChapter 3 Ahmad Bilal ahmadbilal.webs.com
Chapter 3 A Quick Recap We learned about cell and reuse factor. We looked at traffic capacity We looked at different Earling Formulas We looked at channel strategies We had a look at Handoff Interference
More informationUnit-1 The Cellular Concept
Unit-1 The Cellular Concept 1.1 Introduction to Cellular Systems Solves the problem of spectral congestion and user capacity. Offer very high capacity in a limited spectrum without major technological
More informationUnit 4 - Cellular System Design, Capacity, Handoff, and Outage
Unit 4 - Cellular System Design, Capacity, Handoff, and Outage Course outline How to access the portal Assignment. Overview of Cellular Evolution and Wireless Technologies Wireless Propagation and Cellular
More information03_57_104_final.fm Page 97 Tuesday, December 4, :17 PM. Problems Problems
03_57_104_final.fm Page 97 Tuesday, December 4, 2001 2:17 PM Problems 97 3.9 Problems 3.1 Prove that for a hexagonal geometry, the co-channel reuse ratio is given by Q = 3N, where N = i 2 + ij + j 2. Hint:
More informationEENG473 Mobile Communications Module 2 : Week # (8) The Cellular Concept System Design Fundamentals
EENG473 Mobile Communications Module 2 : Week # (8) The Cellular Concept System Design Fundamentals Improving Capacity in Cellular Systems Cellular design techniques are needed to provide more channels
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 informationA Glimps at Cellular Mobile Radio Communications. Dr. Erhan A. İnce
A Glimps at Cellular Mobile Radio Communications Dr. Erhan A. İnce 28.03.2012 CELLULAR Cellular refers to communications systems that divide a geographic region into sections, called cells. The purpose
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 informationECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 3: Cellular Fundamentals
ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2004 Lecture 3: Cellular Fundamentals Chapter 3 - The Cellular Concept - System Design Fundamentals I. Introduction Goals of a Cellular System
More informationCh3. The Cellular Concept Systems Design Fundamentals. From Rappaport s book
Ch3. The Cellular Concept Systems Design Fundamentals. From Rappaport s book Instructor: Mohammed Taha O. El Astal LOGO Early mobile systems The objective was to achieve a large coverage area by using
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 informationChapter 3: Cellular concept
Chapter 3: Cellular concept Introduction to cellular concept: The cellular concept was a major breakthrough in solving the problem of spectral congestion and user capacity. It offered very high capacity
More informationECE 5325/6325: Wireless Communication Systems Lecture Notes, Fall Increasing Capacity and Coverage. Lecture 4
ECE 5325/6325: Wireless Communication Systems Lecture Notes, Fall 2011 Lecture 4 Today: (1) Sectoring (2) Cell Splitting Reading today: 3.7; Tue: 4.1-4.3, 4.9. HW 1 due Friday 10am in HW locker (#3). Please
More informationCellular Concept. Cell structure
Cellular Concept Dr Yousef Dama Faculty of Engineering and Information Technology An-Najah National University 2014-2015 Mobile communications Lecture Notes, prepared by Dr Yousef Dama, An-Najah National
More informationThe Cellular Concept System Design Fundamentals
Wireless Information Transmission System Lab. The Cellular Concept System Design Fundamentals Institute of Communications Engineering National Sun Yat-sen University Table of Contents Frequency Reuse Channel
More informationEKT 450 Mobile Communication System
EKT 450 Mobile Communication System Chapter 6: The Cellular Concept Dr. Azremi Abdullah Al-Hadi School of Computer and Communication Engineering azremi@unimap.edu.my 1 Introduction Introduction to Cellular
More informationData and Computer Communications
Data and Computer Communications Chapter 14 Cellular Wireless Networks Eighth Edition by William Stallings Cellular Wireless Networks key technology for mobiles, wireless nets etc developed to increase
More informationChapter 1 Introduction to Mobile Computing (16 M)
Chapter 1 Introduction to Mobile Computing (16 M) 1.1 Introduction to Mobile Computing- Mobile Computing Functions, Mobile Computing Devices, Mobile Computing Architecture, Evolution of Wireless Technology.
More informationData and Computer Communications. Chapter 10 Cellular Wireless Networks
Data and Computer Communications Chapter 10 Cellular Wireless Networks Cellular Wireless Networks 5 PSTN Switch Mobile Telecomm Switching Office (MTSO) 3 4 2 1 Base Station 0 2016-08-30 2 Cellular Wireless
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 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 informationThe Cellular Concept. History of Communication. Frequency Planning. Coverage & Capacity
The Cellular Concept History of Communication Frequency Planning Coverage & Capacity Engr. Mian Shahzad Iqbal Lecturer Department of Telecommunication Engineering Before GSM: Mobile Telephony Mile stones
More informationUnit 3 - Wireless Propagation and Cellular Concepts
X Courses» Introduction to Wireless and Cellular Communications Unit 3 - Wireless Propagation and Cellular Concepts Course outline How to access the portal Assignment 2. Overview of Cellular Evolution
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 informationCellular Concept MSC. Wireless Communications, CIIT Islamabad. Cellular Concept
Cellular Concept Course Instructor: Dr. Syed Junaid Nawaz Assistant Professor, Dept. of Electrical Engineering, COMSATS Institute of IT, Islamabad, Pakistan. Email: junaidnawaz@ieee.org Courtesy of: Prof.
More informationCommunication Switching Techniques
Communication Switching Techniques UNIT 5 P.M.Arun Kumar, Assistant Professor, Department of IT, Sri Krishna College of Engineering and Technology, Coimbatore. PRINCIPLES OF CELLULAR NETWORKS TOPICS TO
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 informationECS 445: Mobile Communications The Cellular Concept
Sirindhorn International Institute of Technology Thammasat University School of Information, Computer and Communication Technology ECS 445: Mobile Communications The Cellular Concept Prapun Suksompong,
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 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 informationUNIK4230: Mobile Communications Spring Per Hjalmar Lehne Tel:
UNIK4230: Mobile Communications Spring 2015 Per Hjalmar Lehne per-hjalmar.lehne@telenor.com Tel: 916 94 909 Cells and Cellular Traffic (Chapter 4) Date: 12 March 2015 Agenda Introduction Hexagonal Cell
More informationLECTURE 12. Deployment and Traffic Engineering
1 LECTURE 12 Deployment and Traffic Engineering Cellular Concept 2 Proposed by Bell Labs in 1971 Geographic Service divided into smaller cells Neighboring cells do not use same set of frequencies to prevent
More informationSEN366 (SEN374) (Introduction to) Computer Networks
SEN366 (SEN374) (Introduction to) Computer Networks Prof. Dr. Hasan Hüseyin BALIK (8 th Week) Cellular Wireless Network 8.Outline Principles of Cellular Networks Cellular Network Generations LTE-Advanced
More informationS Cellular Radio Network Planning and Optimization. Exercise Set 2. Solutions
S-72.3275 Cellular Radio Network Planning and Optimization Exercise Set 2 Solutions Handover 1 1. What is meant by Hard Handover, Soft Handover and Softer Handover? Hard: like in GSM, no multiple simultaneous
More informationWireless Communications Principles and Practice 2 nd Edition Prentice-Hall. By Theodore S. Rappaport
Wireless Communications Principles and Practice 2 nd Edition Prentice-Hall By Theodore S. Rappaport Chapter 3 The Cellular Concept- System Design Fundamentals 3.1 Introduction January, 2004 Spring 2011
More information2018/5/23. YU Xiangyu
2018/5/23 YU Xiangyu yuxy@scut.edu.cn Structure of Mobile Communication System Cell Handover/Handoff Roaming Mobile Telephone Switching Office Public Switched Telephone Network Tomasi Advanced Electronic
More informationM Y R E V E A L - C E L L U L A R
M Y R E V E A L - C E L L U L A R The hexagon cell shape If we have two BTSs with omniantennas and we require that the border between the coverage area of each BTS is the set of points where the signal
More informationChapter 5 The Cellular Concept
hapter 5 The ellular oncept 1 ell Shape Actual cell/ideal cell Signal Strength Handoff egion ell apacity Traffic theory Erlang B and Erlang ell Structure Frequency euse euse Distance ochannel Interference
More informationECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2013
ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2013 Lecture 3 Today: (2) Trunking Reading: Today: 4.2.2. Thu: Rap 3.7.2 (pdf on Canvas). 1 Trunking Trunking refers to sharing few channels
More informationUNIT- 3. Introduction. The cellular advantage. Cellular hierarchy
UNIT- 3 Introduction Capacity expansion techniques include the splitting or sectoring of cells and the overlay of smaller cell clusters over larger clusters as demand and technology increases. The cellular
More information16582/16418 Wireless Communication. Notes III: Cellular Systems II Dr. Jay Weitzen 1
16582/16418 Wireless Communication Notes III: Cellular Systems II 16.582 Dr. Jay Weitzen 1 US-Channel Allocations CDMA-2000/IS-95 1.25 MHz Channels GSM/PCS 1900-200 khz Channels IS-136 50 khz Channels
More informationCode Planning of 3G UMTS Mobile Networks Using ATOLL Planning Tool
Code Planning of 3G UMTS Mobile Networks Using ATOLL Planning Tool A. Benjamin Paul, Sk.M.Subani, M.Tech in Bapatla Engg. College, Assistant Professor in Bapatla Engg. College, Abstract This paper involves
More information(8+8) 6. (a) Explain the following in detail concern to the mobile system?
SET - 1 1. (a) Explain the operation of the cellular system? (b) Discuss analog cellular systems (AMPS) in detail? 2. (a) What is meant by frequency reuse? Explain various frequency reuse schemes and find
More informationCHAPTER 19 CELLULAR TELEPHONE CONCEPTS # DEFINITION TERMS
CHAPTER 19 CELLULAR TELEPHONE CONCEPTS # DEFINITION TERMS 1) The term for mobile telephone services which began in 1940s and are sometimes called Manual telephone systems. Mobile Telephone Manual System
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 informationCellular Wireless Networks and GSM Architecture. S.M. Riazul Islam, PhD
Cellular Wireless Networks and GSM Architecture S.M. Riazul Islam, PhD Desirable Features More Capacity Less Power Larger Coverage Cellular Network Organization Multiple low power transmitters 100w or
More informationCollege of Engineering
WiFi and WCDMA Network Design Robert Akl, D.Sc. College of Engineering Department of Computer Science and Engineering Outline WiFi Access point selection Traffic balancing Multi-Cell WCDMA with Multiple
More informationMultiple access and cellular systems
RADIO SYSTEMS ETIN15 Lecture no: 9 Multiple access and cellular systems 2017-05-02 Anders J Johansson 1 Contents Background Interference and spectrum efficiency Frequency-division multiple access (FDMA)
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 informationWireless Cellular Networks. Base Station - Mobile Network
Wireless Cellular Networks introduction frequency reuse channel assignment strategies techniques to increase capacity handoff cellular standards 1 Base Station - Mobile Network RCC RVC FVC FCC Forward
More informationCS6956: Wireless and Mobile Networks Lecture Notes: 3/23/2015
CS6956: Wireless and Mobile Networks Lecture Notes: 3/23/2015 GSM Global System for Mobile Communications (reference From GSM to LET by Martin Sauter) There were ~3 billion GSM users in 2010. GSM Voice
More informationChapter 1 Introduction to Mobile Computing
Chapter 1 Introduction to Mobile Computing 1.1 Introduction to Mobile Computing- Mobile Computing Functions, Mobile Computing Devices, Mobile Computing Architecture, Evolution of Wireless Technology. 1.2
More informationCCAP: A Strategic Tool for Managing Capacity of CDMA Networks
CCAP: A Strategic Tool for Managing Capacity of CDMA Networks Teleware Co. Ltd. in cooperation with Washington University, Saint Louis, Missouri, USA What is CCAP Graphical interactive tool for CDMA Calculates
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 informationUNIT-II 1. Explain the concept of frequency reuse channels. Answer:
UNIT-II 1. Explain the concept of frequency reuse channels. Concept of Frequency Reuse Channels: A radio channel consists of a pair of frequencies one for each direction of transmission that is used for
More informationGSM FREQUENCY PLANNING
GSM FREQUENCY PLANNING PROJECT NUMBER: PRJ070 BY NAME: MUTONGA JACKSON WAMBUA REG NO.: F17/2098/2004 SUPERVISOR: DR. CYRUS WEKESA EXAMINER: DR. MAURICE MANG OLI Introduction GSM is a cellular mobile network
More information(Refer Slide Time: 00:01:29 min)
Wireless Communications Dr. Ranjan Bose Department of Electrical Engineering Indian Institute of Technology, Delhi Lecture No. # 5 Cell Capacity and Reuse We ll look at some the interesting features of
More informationUNIK4230: Mobile Communications. Abul Kaosher
UNIK4230: Mobile Communications Abul Kaosher abul.kaosher@nsn.com Cells and Cellular Traffic Cells and Cellular Traffic Introduction Hexagonal Cell Geometry Co-Channel Interference (CCI) CCI Reduction
More informationUNIK4230: Mobile Communications Spring 2013
UNIK4230: Mobile Communications Spring 2013 Abul Kaosher abul.kaosher@nsn.com Mobile: 99 27 10 19 1 UNIK4230: Mobile Communications Cells and Cellular Traffic- I Date: 07.03.2013 2 UNIK4230: Mobile Communications
More information2016/10/14. YU Xiangyu
2016/10/14 YU Xiangyu yuxy@scut.edu.cn Structure of Mobile Communication System Cell Handover/Handoff Roaming Mobile Telephone Switching Office Public Switched Telephone Network Tomasi Advanced Electronic
More informationS Radio Network planning. Tentative schedule & contents
S-7.70 Radio Network planning Lecturer: Prof. Riku Jäntti Assistant: M.Sc. Mika Husso Tentative schedule & contents Week Lecture Exercise. Introduction: Radio network planning process No exercise 4. Capacity
More informationCouncil for Innovative Research Peer Review Research Publishing System Journal: INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY
Performance Analysis of Handoff in CDMA Cellular System Dr. Dalveer Kaur 1, Neeraj Kumar 2 1 Assist. Prof. Dept. of Electronics & Communication Engg, Punjab Technical University, Jalandhar dn_dogra@rediffmail.com
More informationData and Computer Communications. Tenth Edition by William Stallings
Data and Computer Communications Tenth Edition by William Stallings Data and Computer Communications, Tenth Edition by William Stallings, (c) Pearson Education - 2013 CHAPTER 10 Cellular Wireless Network
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 informationFigure 1.1:- Representation of a transmitter s Cell
Volume 4, Issue 2, February 2014 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Study on Improving
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 informationCHAPTER 2. Instructor: Mr. Abhijit Parmar Course: Mobile Computing and Wireless Communication ( )
CHAPTER 2 Instructor: Mr. Abhijit Parmar Course: Mobile Computing and Wireless Communication (2170710) Syllabus Chapter-2.1 Cellular Wireless Networks 2.1.1 Principles of Cellular Networks Underlying technology
More information2.4 OPERATION OF CELLULAR SYSTEMS
INTRODUCTION TO CELLULAR SYSTEMS 41 a no-traffic spot in a city. In this case, no automotive ignition noise is involved, and no cochannel operation is in the proximity of the idle-channel receiver. We
More information3G Network Planning Study with Monte- Carlo Simulation
3G Network lanning Study with Monte- Carlo Nuno Daniel Cardoso ortugal elecom S.A. 1 2 Overview n Objectives. n scenario description. n Load impact on coverage probability. n Noise rise limit. n Handover
More informationCDMA Key Technology. ZTE Corporation CDMA Division
CDMA Key Technology ZTE Corporation CDMA Division CDMA Key Technology Spread Spectrum Communication Code Division Multiple Access Power Control Diversity Soft Handoff Rake Receiver Variable Rate Vocoder
More informationKing Fahd University of Petroleum & Minerals Computer Engineering Dept
King Fahd University of Petroleum & Minerals Computer Engineering Dept COE 543 Mobile and Wireless Networks Term 0 Dr. Ashraf S. Hasan Mahmoud Rm -148-3 Ext. 174 Email: ashraf@ccse.kfupm.edu.sa 4//003
More informationIntroduction to IS-95 CDMA p. 1 What is CDMA p. 1 History of CDMA p. 2 Forms of CDMA p MHz CDMA p MHz CDMA (PCS) p. 6 CDMA Parts p.
Introduction to IS-95 CDMA p. 1 What is CDMA p. 1 History of CDMA p. 2 Forms of CDMA p. 3 800 MHz CDMA p. 6 1900 MHz CDMA (PCS) p. 6 CDMA Parts p. 7 Mobile Station p. 8 Base Station Subsystem (BSS) p.
More informationIntroduction to Wireless Communications
Wireless Information Transmission System Lab. Introduction to Wireless Communications Institute of Communications Engineering National Sun Yat-sen University Wireless Communication Systems Network Radio
More informationFinal Exam (ECE 408/508 Digital Communications) (05/05/10, Wed, 6 8:30PM)
Final Exam (ECE 407 Digital Communications) Page 1 Final Exam (ECE 408/508 Digital Communications) (05/05/10, Wed, 6 8:30PM) Name: Bring calculators. 2 ½ hours. 20% of your final grade. Question 1. (20%,
More informationEEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals
EEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals Interference and System Capacity Interference is the major limiting factor in the performance of cellular
More information1. Classify the mobile radio transmission systems. Simplex & Duplex. 2. State example for a half duplex system. Push to talk and release to listen.
1. Classify the mobile radio transmission systems. Simplex & Duplex. 2. State example for a half duplex system. Push to talk and release to listen. 3. State example for a Simplex system. Pager. 4. State
More informationMobile Communication Systems
Mobile Communication Systems Part II- Traffic Engineering Professor Z Ghassemlooy Electronics & IT Division Scholl of Engineering, Sheffield Hallam University U.K. www.shu.ac.uk/ocr Contents Problems +
More informationMultiple 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 informationMSIT 413: Wireless Technologies Week 2
MSIT 413: Wireless Technologies Week 2 Michael L. Honig Department of EECS Northwestern University September 2017 1 Wireless Standards: Our Focus Cellular LAN MAN PAN Sensor/IoT GSM CDMA2000 WCDMA UMTS
More informationSLIDE #2.1. MOBILE COMPUTING NIT Agartala, Dept of CSE Jan-May,2012. ALAK ROY. Assistant Professor Dept. of CSE NIT Agartala
Mobile Cellular Systems SLIDE #2.1 MOBILE COMPUTING NIT Agartala, Dept of CSE Jan-May,2012 ALAK ROY. Assistant Professor Dept. of CSE NIT Agartala Email-alakroy.nerist@gmail.com What we will learn in this
More informationQuestion Points Score Total 100
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
More informationETI2511-WIRELESS COMMUNICATION II HANDOUT I 1.0 PRINCIPLES OF CELLULAR COMMUNICATION
ETI2511-WIRELESS COMMUNICATION II HANDOUT I 1.0 PRINCIPLES OF CELLULAR COMMUNICATION 1.0 Introduction The substitution of a single high power Base Transmitter Stations (BTS) by several low BTSs to support
More informationECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010
ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010 Lecture 2 Today: (1) Frequency Reuse, (2) Handoff Reading for today s lecture: 3.2-3.5 Reading for next lecture: Rap 3.6 HW 1 will
More informationWireless Communication Technologies (16:332:546)
Wireless Communication Technologies (16:332:546) Taught by Professor Narayan Mandayam Lecture 7 : Co-Channel Interference Slides prepared by : Shuangyu Luo Outline Co-channel interference 4 Examples of
More informationCAPACITY AND THROUGHPUT OPTIMIZATION IN MULTI-CELL 3G WCDMA NETWORKS. Son Nguyen, B.S. Thesis Prepared for the Degree of MASTER OF SCIENCE
CAPACITY AND THROUGHPUT OPTIMIZATION IN MULTI-CELL 3G WCDMA NETWORKS Son Nguyen, B.S. Thesis Prepared for the Degree of MASTER OF SCIENCE UNIVERSITY OF NORTH TEXAS December 2005 APPROVED: Robert Akl, Major
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 informationCellular Network Planning and Optimization Part VI: WCDMA Basics. Jyri Hämäläinen, Communications and Networking Department, TKK, 24.1.
Cellular Network Planning and Optimization Part VI: WCDMA Basics Jyri Hämäläinen, Communications and Networking Department, TKK, 24.1.2008 Outline Network elements Physical layer Radio resource management
More informationDownlink Erlang Capacity of Cellular OFDMA
Downlink Erlang Capacity of Cellular OFDMA Gauri Joshi, Harshad Maral, Abhay Karandikar Department of Electrical Engineering Indian Institute of Technology Bombay Powai, Mumbai, India 400076. Email: gaurijoshi@iitb.ac.in,
More informationChapter 3 Cellular Concept
Chapter 3 Cellular Concept 6 3 7 3 5 6 7 6 7 7 5 Objectives To resolve spectral congestion and user capacity To provide additional radio capacity radio capacity with no additional increase in radio Methods
More informationPerformance Evaluation of 3G CDMA Networks with Antenna Arrays
Jul. 2003 1 Performance Evaluation of 3G CDMA Networks with Antenna Arrays IEEE 4th Workshop on Applications and Services in Wireless Networks Dr. D. J. Shyy The Corporation Jin Yu and Dr. Yu-Dong Yao
More information3.6. Cell-Site Equipment. Traffic and Cell Splitting Microcells, Picocelles and Repeaters
3.6. Cell-Site Equipment Traffic and Cell Splitting Microcells, Picocelles and Repeaters The radio transmitting equipment at the cell site operates at considerably higher power than do the mobile phones,
More information12/29/2017 Introduction to Wireless and Cellular Communications - - Unit 2 - Overview of Cellular Evolution and Wireless Technologies
12/29/2017 Introduction to Wireless and Communications - - Unit 2 - Evolution and Wireless Technologies Course outline How to access the portal Evolution and Wireless Technologies Assignment 1 This assignment
More informationABSTRACT ANTENNA OPTIMIZATION CHALLENGES
ABSTRACT Spectrum and cell/switch equipment are expensive. How can wireless carriers stay more competitive while minimizing capital expense for more capacity and better service quality? ANTENNA OPTIMIZATION
More informationCHAPTER 7 ROLE OF ADAPTIVE MULTIRATE ON WCDMA CAPACITY ENHANCEMENT
CHAPTER 7 ROLE OF ADAPTIVE MULTIRATE ON WCDMA CAPACITY ENHANCEMENT 7.1 INTRODUCTION Originally developed to be used in GSM by the Europe Telecommunications Standards Institute (ETSI), the AMR speech codec
More informationTechnical Requirements for Cellular Radiotelephone Systems Operating in the Bands MHz and MHz
Issue 7 September 2008 Spectrum Management and Telecommunications Standard Radio System Plan Technical Requirements for Cellular Radiotelephone Systems Operating in the Bands 824-849 MHz and 869-894 MHz
More informationGSM NCN-EG-01 Course Outline for GSM
GSM NCN-EG-01 Course Outline for GSM 1 Course Description: Good understanding of GSM technology and cellular networks is essential for anyone working in GSM or related areas. This course is structured
More informationCellular Radio Systems Department of Electronics and IT Media Engineering
Mobile 미디어 IT 기술 Cellular Radio Systems Department of Electronics and IT Media Engineering 1 Contents 1. Cellular Network Systems Overview of cellular network system Pros and Cons Terminologies: Handover,
More informationChapter 1 Basic concepts of wireless data networks (cont d.)
Chapter 1 Basic concepts of wireless data networks (cont d.) Part 4: Wireless network operations Oct 6 2004 1 Mobility management Consists of location management and handoff management Location management
More informationAutumn Main Exam SEAT NUMBER: STUDENTNUMBER: L--- ~~--~--~--~----~--~--L-~ SURNAME: (FAMILY NAME) OTHER NAMES: LECTURER NAME:
Autumn 216- Main Exam SEAT NUMBER: iuts UNIVERSITY OF TECHNOLOGY SYDNEY STUDENTNUMBER: L--- ~~--~--~--~----~--~--L-~ SURNAME: (FAMILY NAME) OTHER NAMES: LECTURER NAME: This paper and all materials issued
More information