second generation mobile systems

8/8/2019 Second Generation Mobile Systems

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Second Generation Mobile Systems :An Overview


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Pre-Requisites:

TE-441 Mobile & Satellite Communication

TE-311 Communication SystemsDigital Communications Principles, Cellular Network

Basics, Global System for Mobile communication,

Data Communication, TCP/IP and OSI Layered

Models and Routing and Switching techniques.

General Information [2]


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Teaching Faculty: Muhammad Abdul Aleem

Email Address: [email protected]

[email protected]

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Text Book:

YI-BING LIN and IMRICH CHLAMTAC, Wireless and Mobile Network

Architectures, John Wiley & Sons, ISBN 9971-51-366-8

HARRY HOLMA and ANTTI TOSKALA, WCDMA for UMTS Radio Access for

Third Generation Mobile Communications, 3rd Edition, John Wiley & Sons,

ISBN 0-470-87096-6

Reference Books:

CHARLES PERKINS, Mobile IP, Design Principles and Practises, Addison-

Wesley, 1998

HAMID GHAVAMI, Ultra Wideband Communication, John Wiley & Sons, 2004

Web Resources:

3GPP standardization documents: http://www.3gpp.org/specs/numbering.htm



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Course Objectives:

Part I of the course deals with system and application aspects of 2.5G(GPRS&EDGE) and third generation cellular mobile system (UMTS).

Part II is concerned with the more latest, advanced and robust wireless

solutions like HSDPA, WiMAX, WLAN, Mobile IP, Ultra Wide Band

communications.


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Learning Outcomes:

At the end of the course students should

understand basic elements of a mobile network;

understand operation of 2.5G cellular mobile systems;

have familiarity with third generation systems;

be able to understand the techniques used in fourth generation systems;

be able to plan and optimise cellular networks;

have an awareness of services and applications.



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Breakdown of Assessment

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No. Description Mark Distribution (%)

1.

2.

3.

4.

5.

6.

Final Exam

Hourly Tests (Best of Two)

Theoretical Assignments (Min. Four)

Term Paper (Individual)

Quizzes (Min. Four)

GSS/Class Participation

40

30

08

10

08

04

TOTAL 100%


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Class Policies

Policy on Using Personal Communications Devices

Mobile phones are to remain OFF during the class hours.

Policy on Class Absences

A student shall be DROPPED from a course anyway if the number of

absences exceeds six.

Policy on Assignments/Project

NO assignments/projects will be accepted after the due date.

ZERO TOLERANCEagainst plagiarism.

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Term Paper

Date Assigned : Week beginning

Proposal Submission : 1Week after assigned date

Paper Submission : 2nd lastWeek

Seminar/Presentation : LastWeek ending

Total Duration : 10 weeks

Marks Distribution :

Summary (2 weeks) : 02Abstract (1 week) : 02

Final Submission : 06

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Cellular Radio [1]

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Cellular Radio [2]

Single Cell Vs Multiple Cell

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Cellular Radio [3]

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Estimation of Traffic

Grade of Service???

Cellular Radio [4]

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Cellular Radio [5]

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Cellular Radio [6]

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Cellular Radio [7]

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Sectorization:

Cellular Radio [8]

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Cell Splitting

Cellular Radio [9]

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Assignment

In time, more customers use the system, traffic may build up

so that there are not enough frequencies assigned to a cell tohandle its calls. Discuss the different approaches used to

cope with this situation.


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Near and Far Interference

Cellular Radio [10]

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Multiple Access Techniques

1. FrequencyDivision Multiple Access (FDMA)

2. Time Division Multiple Access (TDMA)

3. Code Division Multiple Access (CDMA)

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GSM [1]

BTS

MS

Um

BTS

BTSBSC

Base Station Subsystem (BSS)

A-bis

A

BTS: Base Transceiver StationBSC: Base Station ControllerHLR: Home Location Register

VLR: Visited Location RegisterOMC: Operation & Maintenance Centre

EIR: Equipment Identity Register AUC: Authentication Centre

HLREIR VLR OMC

AUC

F

H G

BC

other MSCs

E

PSTNISDNCSPDNPSPDN

other VLRs

other BSSs

D

MobileServicesSwitchingCentre(MSC)

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Logical Control Channels

Downlink Uplink

Broadcast Control Channels

Frequency Correction - FCCH

Synchronization SCH

Broadcast - BCCH-

Common Control Channels

Access Grant - AGCH

Paging - PCH

Common Control Channels

Random Access - RACH

Dedicated Control Channels

Stand alone Dedicated - SDCCH

Slow Associated SACCH

Fast Associated - FACCH

GSM [2]

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GSM [3]

0 54321 76

SACCHTC0 TC13TC12TC11TC10TC1 TC23 Idle

120ms

One full-rate channel (multiframe)

1 TDMA frame = 8 timeslots (4.615 ms)

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Handover:

I. HardHandover

II. MAHO

III. Intra BBS HO

IV. Inter BSS HO

V. Inter MSC

GSM [4]

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GSM Network Protocol Architecture

MS BTS MSCBSC

Um Interface A-bis interface A interface

Layer 3

Layer 2

Layer 1

CM

MM

RR

RR

MM

CM

RR

LAPDm LAPDm LAPD LAPD

physical

layer

physical

layer

physical

layerphysical

layer

BTSMBTSM

BSSAPBSSAP

SCCP SCCP

MPT MTP

GSM [5]

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Important Terms

MSISDN

IMSI

MSRN

GSM [6]

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HLR

MSRNGMSC MSC / VLR

Incoming Call

MSISDN

(1) MSISDN(2) IMSI

(4) MSRN (3) MSRN

An example of a call routing (to route an incoming call towards serving MSC)

MSISDN Mobile Station ISDN Number

IMSI International Mobile Subscriber Identity

MSRN Mobile Station Roaming Number

GSM [7]

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second generation mobile systems

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