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PROJECT REPORTPROJECT REPORT

INTRODUCTION TO CDMAINTRODUCTION TO CDMA

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WIRELESS SERVICES WIRELESS SERVICES

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MTNL servicesMTNL services

Basic landline servicesBasic landline services Dolphin mobile servicesDolphin mobile services Garuda mobile sevicesGaruda mobile sevices Jadoo mobile servicesJadoo mobile services Broadband servicesBroadband services

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Difference b/w CDMA & GSMDifference b/w CDMA & GSM

CDMA stands code division multiple accessCDMA stands code division multiple access Both data & voice are separated from Both data & voice are separated from

signal s using codes and then transmitted signal s using codes and then transmitted using wide frequency range.using wide frequency range.

in CDMA more space is left in channel for in CDMA more space is left in channel for data transfer.data transfer.

14%of worldwide market goes to CDMA14%of worldwide market goes to CDMA In CDMA all user share same 1250 kHz In CDMA all user share same 1250 kHz

wide carrier.wide carrier.

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Difference b/w CDMA & GSM(contd.)Difference b/w CDMA & GSM(contd.)

In CDMA has digital transfer rate of In CDMA has digital transfer rate of 9.6kbps,same as GSM9.6kbps,same as GSM

Voice data part of the connection is Voice data part of the connection is transmitted at a rate of 8kbps.transmitted at a rate of 8kbps.

Theoretically CDMA allowing a Theoretically CDMA allowing a maximum of 131 connections,as maximum of 131 connections,as compared to 48 GSM connection in a compared to 48 GSM connection in a similar bandwidth.similar bandwidth.

GSM stands global system mobile. GSM stands global system mobile.

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Difference b/w CDMA & GSM(contd.)Difference b/w CDMA & GSM(contd.)

Roaming readiness and fraud prevention Roaming readiness and fraud prevention are two major advantage from this are two major advantage from this technology.technology.

In GSM,TDMA(time division multiple acess) In GSM,TDMA(time division multiple acess) technique is used.technique is used.

GSM system create 8 time division GSM system create 8 time division channels in 200khz wide carrier.channels in 200khz wide carrier.

Only one subscriber at a time is assigned Only one subscriber at a time is assigned to each time slot or channel. to each time slot or channel.

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Description of various CDMA N\WDescription of various CDMA N\W

MSC(Mobile Switching Centre)MSC(Mobile Switching Centre) VLR(visitor location register)VLR(visitor location register) Bsc (base switching centre)Bsc (base switching centre) Hlr (home location register)Hlr (home location register) Scp (service control point)Scp (service control point) Gmsc (gateway msc)Gmsc (gateway msc) Aaa (authentication,authorization and Aaa (authentication,authorization and

accounting)accounting)

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How a BTS sector serves multiple userHow a BTS sector serves multiple user

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Function of the CDMA channelFunction of the CDMA channel

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Physical channels in CDMAPhysical channels in CDMA

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Registration procedureRegistration procedure

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Security technique in mobile Security technique in mobile communicationcommunication

Over the air programmingOver the air programming Mobile equipment identifier(MEID)Mobile equipment identifier(MEID) International mobile equipment identity(IMEI)International mobile equipment identity(IMEI) Electronic serial number.Electronic serial number.

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Over The Air ProgrammingOver The Air Programming

Over the air programming(OTA) methods of Over the air programming(OTA) methods of distributing new s/w updates to cell phone to distributing new s/w updates to cell phone to access services such as MMS.access services such as MMS.

OTA messaging provides remote control of OTA messaging provides remote control of mobile phone for service and subscription mobile phone for service and subscription activation, personalization for mobile operator activation, personalization for mobile operator and third parties.and third parties.

This technique is mainly used in CDMA .This technique is mainly used in CDMA .

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Mobile Equipment IdentifierMobile Equipment Identifier

A MEID is globally unique number A MEID is globally unique number identifying a physical piece of CDMA identifying a physical piece of CDMA mobile station equipment.mobile station equipment.

The number format is generally The number format is generally hexadecimal digit.hexadecimal digit.

The MEID was created to replace The MEID was created to replace ESN.ESN.

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International Mobile Equipment IdentityInternational Mobile Equipment Identity

The IMEI is a number unique to every GSM The IMEI is a number unique to every GSM and WCDMA(3G) mobile phone,as well as and WCDMA(3G) mobile phone,as well as some satellite phones.some satellite phones.

It can be displayed on the screen of the phone It can be displayed on the screen of the phone by entering *#06# into the keypad.by entering *#06# into the keypad.

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