Mobile Communication (404189)

Teaching Scheme: Lectures: 4Hrs/ Week

Examination Scheme:

In Semester Assessment:Phase I : 30

End Semester Examination:Phase II: 70

"Proper Planning Prevents Poor Performance."

Attendance

Dress

Seating

Late coming

Notes

Allied Activities

e.g. Drinking H2O, Talking, etc.

Questions

Lap-Top

MATLAB

Append Only

Copying

Unit I :

Telecommunication Switching & Traffic 8L

1.0 Telecommunication switching: 1.1 Message switching1.2 Circuit switching1.3 Manual switching1.4 Electronic Switching

1.5 Digital switching:

1.6 Switching functions

1.7 Telecommunication Traffic: 1.8 Unit of Traffic1.9 Traffic measurement1.10 A mathematical model

1.11 Lost-call Systems: 1.12 Theory1.13 Traffic performance1.14 Loss systems in tandem1.15 Traffic tables

1.16 Queuing Systems: 1.17 Erlang Distribution1.18 Probability of delay1.19 Finite queue capacity1.20 Systems with a single

server1.21 Queues in tandem1.22 Delay tables and application

of Delay formulae.

Unit II:

Switching Networks and Signaling

8L

1.1 Single Stage Networks1.2 Grading1.3 Link Systems1.4 Grades of service of link

systems

Time Division Switching:

1.5 Space and time switching1.6 Time division switching

networks1.7 Synchronization1.8 Call processing Functions1.9 Common Control1.10Reliability1.11Availability1.12Security

Signaling: 1.13Customer line signaling

1.14FDM carrier systems1.15PCM signaling1.16Inter-register signaling1.17Common channel signaling

principles1.18CCITT signaling No. 61.19CCITT signaling No. 71.20Digital customer line

signaling.

Unit III: Cellular Concepts 6L

Evolution of Wireless systems

Cellular telephone system

2 Frequency reuse3 Channel Assignment4 Handoff strategies5 Cell Splitting

Propagation Mechanism:

6 Free space loss7 Reflection8 Diffraction9 Scattering

Fading and Multipath: 10 Small scale multipath

propagation11 Impulse response model of

multipath channel

Multiple Access Techniques12 TDMA13 FDMA14 CDMA

Unit IV:

First and Second Generation Mobile Systems6L

First Generation Cellular Systems

15 AMPS

GSM Cellular Telephony 16 Basic GSM Architecture17 Basic radio transmission

parameters in GSM system18 Logical Channels19 GSM time hierarchy20 GSM burst structure21 Description of call setup

procedure22 Handover23 Modifications and derivatives

of GSM

Unit V:

GSM Services 8L

GSM Physical layer:

24 Speech Coding and decoding25 GMSK modulation

Data transmission in GSM:

Data Services

26 SMS (Short Message Service)

27 HSCSD(High Speed Circuit Switched Data)

28 GPRS (General Packet Radio Service)

29 EDGE (Enhanced Data rate for GSM

Evolution)

Unit VI :

CDMA Based Mobile Systems 8L

Motivation for CDMA use

Spreading Sequences

Basic Transmitter and Receiver schemes

Rake Receiver

IS-95 system: 30 Frequency Range31 Downlink transmission32 Uplink transmission33 Power control

3G mobile systems:

W-CDMA (Wideband – CDMA) CDMA-2000

Lab Practice - III (404193)

Mobile Communication & Broadband Communication Systems

Teaching Scheme:

Practical: 4 Hrs/week

Examination Scheme:

Oral: 50MarksTerm Work: 50Marks

Mobile Communication

List of the Experiments

1. Experiment on TST switch

http://www.google.com/patents/US3956593

SPC

Control Signaling Message

2. Experiment on analysis of Telecommunication traffic

3. Simulation of a wireless channel model

Channel refers to the path between Transmitter and Receiver whether it may be wired or wireless.

Channel model refers to the mathematical equation describing the channel behavior between the Transmitter and Receiver.

TWO main types of channels 34 time invariant channel 35 time varying channel

Channel models e.g. Additive White Gaussian Noise (AWGN), Rayleigh and Rician, etc. are used by communication design engineer for the purpose validating transmitter and receiver design.

http://in.mathworks.com/help/comm/examples/ieee-802-11n-channel-models.html

4. Experiment on Mobile phone

An antenna A liquid crystal display (LCD) A keyboard A microphone A speaker A battery

5. Experiment on GSM

AC = authentication center BSS = base station subsystem EIR = equipment identity register HLR = home location register

Wirelineterminal

MSC

PSTN

BSS BSS

STP SS7HLRVLR

EIRAC

MSC = mobile switching centerPSTN = public switched telephone network STP = signal transfer point VLR = visitor location register

6. Experiment on AT commands

"AT" meaning 'attention'

Commands for communication between Modems

Command set has four groups

1. Basic Command Set 2. Extended Command Set 3. Proprietary Command Set

- Vary widely among modem

Manufacturers

4. Register Commands

7. Simulation of Speech Coding and Decoding

Speech coding uses speech-specific parameter estimation using audio signal processing techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting modeled parameters in a compact bit stream.

8. Experiment on GMSK modulation

Gaussian Minimum Shift Keying is a continuous-phase Frequency Shift Keying modulation scheme.

It is similar to standard Minimum Shift Keying (MSK); however the digital data stream is first shaped with a Gaussian filter before being applied to a frequency modulator. This has the advantage of reducing sideband power, which in turn reduces out-of-band interference between signal carriers in adjacent frequency channels.

GMSK increases the modulation memory in the system and causes Inter Symbol Interference.

GMSK has high spectral efficiency, but it needs a higher power level than QPSK, in order to reliably transmit the same amount of data.

9. Experiment on Spreading Sequences

The spread spectrum systems were originally built for the military.

The aim of spread Spectrum systems was to hide the fact that digital transmission was taking place, toMake the transmission difficult to intercept and to make it robust against intentional jamming.

- m-sequences

- Gold and Kasami sequences

- Walsh sequences

10. Experiment on CDMA

11. Experiment on 3G Mobile

Third generation of mobile telecommunications technology based on a set of standards used for mobile devices and mobile telecommunication services and networks that comply with the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union (ITU)

12. Experiment on VOIP implementation

VOIP

A methodology for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks

13. Visit to Mobile Telephone Switching Office (MTSO)

MTSO Contains the switching equipment for routing mobile phone calls by controlling the cell sites that are connected to the MSC

Switching equipment is called Mobile Switching Center (MSC)

Text Books

1. J. E. Flood , “Telecommunications Switching, Traffic and Networks”Pearson Education

1. Krzysztof Wesolowski, eBook available“Mobile Communication Systems”, Wiley Student Edition

Reference Books

2. Theodore S Rappaport, eBook available“Wireless Communications Principles and Practice” Pearson Education

3. John C. Bellamy, eBook available“Digital Telephony”, Wiley Publications

4. Thiagarajan Vishwanathan,“Telecommunication Switching Systems and Networks”; PHI Publications

5. Wayne Tomasi, “Electronic Communications Systems”; Pearson Education

6. Vijay K Garg, Joseph E Wilkes,“Principles and Applications of GSM” Pearson Education

7. Vijay K Garg, Joseph E Wilkes,“IS-95 CDMA and CDMA 2000 Cellular/PCS Systems Implementation” Pearson Education

8. Mischa Schwartz,eBook available“Mobile Wireless Communications”, Cambridge University Press

TELETRAFFIC ENGINEERING HANDBOOKTechnical University of Denmark

Course Objectives:

To learn and understand the basic principles of Telecommunication switching, traffic and networks

To learn and understand basic concepts of cellular system, wireless propagation and the techniques used to maximize the capacity of cellular network.

To learn and understand architecture of GSM and CDMA system.

To understand mobile management, voice signal processing and coding in GSM and CDMA system

Course Outcomes:

After successfully completing the course students will be able to

Explain and apply the concepts telecommunication switching, traffic and networks

Analyze the telecommunication traffic.

Analyze radio channel and cellular capacity.

Explain and apply concepts of GSM and CDMA system.