I-MODE

I-MODE HISTORY

I -mode was launched in Japan on 22 february 1999 by the mobile operator NTT DOCOMO.

Further Developments:

Dec. 1999 i-mode compatible handsets with color screens were marketed

Jan. 2001 i-appli service launched Jul. 2001 i-area service launched

SERVICES OFFERED BY I-MODE

dominates other network operators.(eg .kddi network which use wap)

ntt docomo decides its own formats..ie.,e-mail,web access and picture exchange…

that was a big success. more than 30 million users in three years….

info:”it dominates wap” wap was a failure

i-mode protocol

Packet PDC-P) Personal Digital Cellular-Packet

i-mode provides Internet service using Personal Digital Cellular-Packet (PDC-P) and a subset of HTML 3.0 for content description.

i-mode allows application/content providers to distribute software (Java applets) to cellular phones and also allows users to download applets (e.g., games)

the communication and is carried over TCP/IP for the wired

part of the communication.

Protocols Services

ARQ: special service transport layer protocol with stop-and-go control.

Tcp/ip: within the operator’s network and operator’s gateway and a content provider…ie.,(within different layer1 and layer

http: known as www.imode application to display web pages , e-mail services which is a compact html(chtml).

why i-mode hit the target? i-mode was a big hit in japan y not wap????

Simple to use…

As a pc replacement for e-mail chatting etc.

Because of attractive color display images…(gif format)

For attractive purpose subset of html ie., chtml used….

POPULARITY OF I-MODE IN JAPAN

Popularity of i-mode in japan is due to the following reason.

i-mode service is used by 30% of japanese population more than 10 times each day to check e-mail ,book tickets for trains or

theatre ,check the whether ,internet banking and for variety of rich uses.

Japanese people adopt technologies mainly for their

convenience ,which is what the i-mode offers.

Difference between wap and i-mode?

one big difference: i-mode packet oriented bearer.. Wap started with connection oriented

bearer(gsm). in i-mode,Stack is used for sending an sms

indicating new e-mail is arrived…. Wap had to either permanantly open to

support interactive web browsing… It was a draw back takes long time,expensive.. i-mode includes images, animated images and color . WAP implementations only use text and no images

i-mode related services

i-appli: i-mode with Java This service group consists of software (programs) used

with i-mode compatible mobile phone terminals.

Downloading the software makes it possible automatically update the news and weather forecast displays as well as to play new games.

i-area: Location Based Service This is DOCOMO's location information service. The i-

area service enables the user to check the weather forecast, traffic and store information and other convenient information for local areas as well as the map information to the user's current location.

Advantages vs disadvantagesAdvantages Wireless internet service (could be deployed over WAP)

Sites based on HTML (cHTML)

60% of world’s wireless internet users Usually used over packet switched connections

Services user-oriented, fun-oriented Anyone can produce content, DoCoMo operates content menus

Disadvantages Small display size

Spotty coverage (tunnels, near buildings)

Low bandwidth (wireless)

I-mode’s Contribution

Entertainment – Character Download, Horoscope/Fortune Telling, download ring tones, FM club event , Karoke/Hit Song info.

Information - News Updates, Weather Forecasts, Sports News, Stock Quotes, Business / Technology News, Town Information, Horse Racing Information, etc

Database Access - Directory Search, Restaurant Guide, Dictionary Service, Cooking Recipes, etc

Transactions - Money Transfer / Balance Check, Security Trading, Airline reservation / Seat Availability, Credit card Information Sales, etc.

i-mode vs wap

Conclusion:

i-mode phones are very good features,in future,using i-mode phones we can always connect internet

The packet data transmission techonology allows for constant connectively therefore users are not charged for how long they are online,since this time is unlimited

SyncML

WHAT IS SYNCML?

A set of protocols and a mark up language for synchronisation of data in mobile sceanrios provided by the Syncml framework..

Supported by companies like nokia,openware,panasonic,starfish.

Vendor independent mechanisms for the administration of devices and applications

standard synchronisation

Simplifies application designs and usage of synchronisation mechanisms.

Agents:Sync server agents:Sync client agents:Server also as a Sync engine

Synchronisation:

Synchronisation run over http,wsp also on smtp,tcp/ip..

Syncml do not make any assumption data..

Each data has a unique identifier..Clients and servers map to the

individual identifiers…Servers knows the mappping

details…

Types of synchronisation:

Two way synchronisation:

Exchange change logs between server and client…

Example:A client crashed and has a lost all

information a special slow synchronisation is used..

What is slow synchronisation?

First transfers all data from the client to server.

Server then compares all data and sends the necessary changes back to client…

One way synchronisation:

One party is interested:Either client or server..Messages exchanged based on xml.Tags used:<add>,<copy>,<delete>,<replace><atomic>: Either all changes or no changes

occur. If a conflict occurs the data is roll

back…

Thank You….