Sony Ericsson J200 User Manual
J200
November 2004
White Paper J200
Preface
Purpose of this document
The Sony Ericsson J200 White Paper is designed to give the reader a deeper technical understanding of
how the Sony Ericsson J200 is designed, and of how it interacts with other media. This document will
make it easier to integrate the J200 with the IT and communications solutions of a company or organization.
People who can benefit from this document include:
• Corporate buyers
• IT Professionals
• Software developers
More information, useful for product, service and application developers, is published at
Sony Ericsson Developer World, www.SonyEricsson.com/developer
tion about technologies, products and tools.
This White Paper is published by:
Sony Ericsson Mobile Communications AB,
SE-221 88 Lund, Sweden
Phone: +46 46 19 40 00
Fax: +46 46 19 41 00
www.SonyEricsson.com
© Sony Ericsson Mobile Communications AB,
2004. All rights reserved. You are hereby granted
a license to download and/or print a copy of this
document.
Any rights not expressly granted herein are
reserved.
Second edition (November 2004)
Publication number: EN/LZT 108 7381 R2A
• Support engineers
• Business decision-makers
• Content providers
, which contains up-to-date informa-
This document is published by Sony Ericsson
Mobile Communications AB, without any
warranty*. Improvements and changes to this text
necessitated by typographical errors, inaccuracies
of current information or improvements to
programs and/or equipment, may be made by
Sony Ericsson Mobile Communications AB at any
time and without notice. Such changes will,
however, be incorporated into new editions of this
document. Printed versions are to be regarded as
temporary reference copies only.
*All implied warranties, including without limitation
the implied warranties of merchantability or fitness
for a particular purpose, are excluded. In no event
shall Sony Ericsson or its licensors be liable for
incidental or consequential damages of any
nature, including but not limited to lost profits or
commercial loss, arising out of the use of the
information in this document.
2 November 2004
White Paper J200
Online Developer Resources
On www.SonyEricsson.com/developer, developers will find all documentation and tools such as phone
White Papers, Developers Guidelines, SDK's and API's etc. The developer web site also contains discussion forums monitored by our Sony Ericsson Developer Support team, a searcheable Knowledge Base of
support queries and solutions, Tips & Tricks, example code etc. To stay up to date on development issues,
register and subscribe to the monthly Sony Ericsson Developer Newsletter.
Sony Ericsson Developer Support
Sony Ericsson offers developers professional technical support services. The service can be purchased
from the developer web portal, as part of the Sony Ericsson Core and Core+ membership package or as
individual support incidents. There are two levels of support, described below.
The Basic E-mail Developer Support is an annual support service included in the Core membership that
provides developers with all the basics to successfully develop world-class applications for Sony Ericsson
products. With this support contract, developers get access to Sony Ericsson developer support engineers via e-mail with same-day response, five technical support incidents as well as the ability to purchase more.
The Priority E-mail Developer Support is an annual support service included in the Core+ membership that
equips professional developers with everything they need to successfully develop world-class applications for Sony Ericsson products. With this support contract, developers get priority access to Sony Ericsson developer support engineers via e-mail with fast response times and up to 50 technical support
incidents.
Document history
Change history
2004-11-10 Version R2A
3 November 2004
Contents
Purpose of this document .........................................................................................2
Document history ......................................................................................................3
Product overview ........................................................................................................5
Key functions and features .......................................................................................6
More in-phone functions ...........................................................................................8
Technologies in detail ...............................................................................................11
Internet services .....................................................................................................12
Using the Internet with J200 ................................................................................12
Bearer type characteristics ..................................................................................13
Security using WAP .............................................................................................13
Configuration of WAP settings ............................................................................14
Push services .......................................................................................................14
WAP with GPRS ......................................................................................................15
Data connections .................................................................................................15
General Packet Radio Services ...........................................................................16
Using GPRS in the J200 ......................................................................................16
SIM application toolkit .............................................................................................17
Digital Rights Management .....................................................................................17
Online Developer Resources ...................................................................................18
Sony Ericsson Developer Support ..........................................................................18
Infrared transceiver .................................................................................................18
Connection via infrared ........................................................................................19
Messaging ...............................................................................................................19
EMS (Enhanced Messaging Service) ...................................................................19
Polyphonic ringtones ...............................................................................................21
Protocol ...............................................................................................................21
Rich musical ringtones – 40 voices .....................................................................22
Combined wavetable and FM sound synthesis ...................................................22
In-phone functions and features .............................................................................23
Network-dependent features ..................................................................................25
SMS and EMS messaging ...................................................................................25
Fixed dialling and Restricted calls .......................................................................25
White Paper J200
Facts and figures ......................................................................................................26
Technical specifications ..........................................................................................27
Tone and percussion maps in the J200 ..............................................................39
Chinese versions .....................................................................................................47
Terminology and abbreviations ...............................................................................47
Related information .................................................................................................49
Documents ..........................................................................................................49
Links ....................................................................................................................49
Trademarks ..........................................................................................................50
Consumer pack content ......................................................................................50
4 November 2004
White Paper J200
Product overview
The J200 is the latest member of Sony Ericsson’s attractive and affordable range of mobile phones. It features a crisp colour display with 4096 colours making it fun to use. You can personalize the phone with the
integrated themes or download new content such as polyphonic ringtones and wallpapers. With GPRS
(General Packet Radio Services), the J200 offers a fast and satisfying mobile Internet experience.
The J200 is a triple band 900/1800/1900 product, which will start shipping in Q4 2004.
5 November 2004
Key functions and features
White Paper J200
The J200 has an innovative interface that enables
fast and efficient use. The main menu that provides
an overview of all functions and features in the
phone, is easily reached by pressing the joystick in
standby. The main menu is accessible during an
ongoing call, this feature allows multitasking - an
air time generator.
Actions in the J200 are always carried out in the
most efficient way, and in standby there is a visible
status bar at the top of the display. The status bar
extends the usage of non-voice features by displaying icons and indicators of ongoing calls.
The user can enjoy the ultimate viewing experience
offered by the phone’s 4096 full colour display. The
display has 128 x 128 pixels and offers maximum
information with the least scrolling.
Ringtones
There are several ways to find a catchy ringtone for
the J200. One way is to choose any of the pre-programmed ringtones in the phone. It is also possible
to download a ringtone from a WAP site, receive a
tune via infrared, or receive it in an EMS message
from a friend or a company that sells ringtones. Up
to 8 polyphonic ringtones of 30kb can be downloaded. When the phone’s memory is full the user
must delete content in order to free up space for
new content.
Display
The J200 display is an STN LCD (Super Twisted
Nematic Liquid Crystal Display) with 4096 colours.
It measures 128 x 128 pixels, which is larger than
those offered by many other phones on the market.
Compared to 256 colour displays, the contouring
effect that arises in colour gradients is less visible
on 4096 colour displays, resulting in a smoother
transition from, for example, a darker to a lighter
nuance.
A large colour display makes it funnier to browse
content that is stored in your phone, like pictures,
themes and wallpapers, and when online, using
mobile Internet, you are able to enjoy colourful web
pages. Such displays take mobile gaming to a
totally new level, making gaming the certain choice
when you have some time to spare, for example
while travelling or waiting for the bus.
Polyphonic ringtones
Pleasing to the ear, polyphonic ringtones can play
up to 40 voices simultaneously. The word “polyphony” means playing with several voices at the same
time. Almost all music that we listen to consists of
polyphonic melodies.
EMS (Enhanced Messaging Service)
Enhanced Messaging Service (EMS) adds a new
powerful functionality to the well-known SMS
standard. With it, mobile phone users can add life
to SMS text messaging in the form of pictures, animations, sound and formatted text. This gives the
users new ways to express feelings, moods and
personality in SMS messages. Apart from messaging, users will enjoy collecting and swapping pictures and ringtones and other melodies,
downloading them from the Internet or editing them
directly on the phone.
6 November 2004
White Paper J200
EMS uses existing SMS infrastructure and industry
standards, keeping investments to a minimum for
operators and providing a familiar user interface
and compatibility with existing phones and with
other manufacturers.
Nokia Smart Messaging
The J200 supports Nokia Smart Messaging by
allowing the user to receive, store, and use pictures
and ringtones included in messages sent from
Nokia phones. The max size of a picture is 2016
pixels (72x28). It is also possible to send a Nokia
push message.
Internet services
The typical WAP client is a small, portable device
which is connected to a wireless network. This
includes mobile phones, pagers, smart phones,
PDAs and other small devices. In these devices,
you have a limited user interface, low memory and
computing power compared to desktop and laptop
computers.
The Internet browser in the J200 is compliant with
WAP 1.2.1, including security according to WTLS
class 2. It is designed for WML and cannot read
ordinary HTML pages, but it is suitable for
interaction with services, such as ticket
reservation. It is also handy when you want to
access text-based information, for example
newsreading, timetables, share prices, exchange
rates, Internet banking and other interactive
services.
GPRS
GPRS uses Internet-style packet based
technology. It uses the radio link only for the
duration of time that it transfers data. GPRS offers
the user the speed needed for satisfactory mobile
Internet usability. The J200 supports the GPRS 4+1
standard, which is the fastest GPRS standard to
date.
Image editor
The J200 supports Sony Ericsson Image Editor.
You can download the software to your PC from
www.SonyEricsson.com
.
ware to create wallpapers for your phone and edit
images to send to your friends. Or make perfect
shots of your friends for your Picture phonebook and build up the best-looking set of contacts
around!
Infrared
Infrared communication creates a data link
between two communications devices through an
infrared beam of light. On the J200, this link is used
to connect with other phones, like the Sony Ericsson T610, and other hardware supporting the
standard. Key benefits of using the J200 with its
built-in infrared transceiver are, for example, the
true wireless communication and the exchange of
ringtones and wallpapers between compatible
phones.
Triple band support
Triple band support means that you can use the
phone on three types of GSM networks; the J200
can be used on GSM 900, 1800, and 1900 networks.
Co-branding
It is possible for a co-brand inlay to be placed on
the front of the phone, in the area below the keypad. Sony Ericsson offers high quality print on the
co-brand inlay, with good resistance to external
stress.
Settings
Operators can customize many settings in the
phone, such as data communication settings, the
download links in the menu system, and the handling of long text messages, for example.
Content
Much of the content in the phone can be customized. For example:
• Start-up display
• Polyphonic ringtones
• SMS/EMS templates
•Themes
• Wallpapers
The Image Editor lets you crop, zoom, rotate and
adjust colour, contrast and brightness settings for
many PC image file formats, and send them via
Infrared directly to your phone. Use this fun soft-
7 November 2004
More in-phone functions
White Paper J200
Keys to efficiency
The layout of the keys is one of many new and
improved elements in the J200, helping the user to
find functions and features in the phone quickly
and easily. Conveniently and ergonomically
grouped together, the Yes and No keys, a joystick,
an option key and the “C” key enable the user to
navigate, select and perform actions.
Joystick
The J200 has an easy-to-use joystick which allows
you to easily navigate the new J200 menu system.
When you arrive at the required function in a menu,
instead of pressing the Yes key, gently press the
centre of the joystick and the selected feature is
activated.
Option key
The option key provides the user with a list of
options while in a function.
• In standby, press to turn on or off silent mode,
activate IR, see the status menu.
• In standby, press and hold for instant WAPaccess.
• During an ongoing call, press to control calling
functions, for example, Tur n of f ton e s, Hold call,
and Join calls.
• When writing a text message, press for a list of
options, for example to insert an item in the
message or to select text format or input language. Another way to access the input language menu when writing a text message, is by
pressing and holding the “#” key.
“C” key
The “C” key is used to delete items and to turn
sounds on and off.
Themes
The already popular themes in Sony Ericsson
mobile phones have been further developed and
improved in the J200, enabling the user to personalize the phone with pictures, colours, wallpapers,
and the like. The J200 comes with four embedded
themes and all their features are displayed in the
large 4096 colour screen, which gives a unique
user experience. As a customization, themes can
be replaced by the operator.
Wallpapers
The user can have a wallpaper in the display, to
bring extra life to the phone when in standby mode.
The wallpaper can be one of up to 10 pre-defined,
replaceable pictures or an operator defined picture.
It is also possible for users to download wallpapers
from WAP sites. Up to 14 wallpapers 15 kb can be
downloaded. When the phone’s memory is full the
user must delete content in order to free up space
for new content.
Games
The latest development of mobile phones with
large colour displays and polyphonic sounds has
taken mobile gaming to new heights. What was
once mainly greyscale, dull games with poor
sound, is now exciting action games in thousands
of colours and with impressive sound effects.
The J200 features popular games for different
moods and skills. Examples of such games are:
•Black deal
• Casino wheel
• Deep abyss
In addition to impressive graphics and sounds, the
J200 is also equipped with force-feedback functionality, a popular feature of many games that are
developed for mobile phones today.
Start-up show
One way to make the J200 more personal is to
have a user-defined start-up show. Each time the
phone is turned on, an animation or picture, with or
without sound, appears in the display. There is one
Sony Ericsson-defined show stored in the phone,
and it is also possible to have one operator/customer defined show. As with the wallpaper, the
user-defined show can use any of the pictures
stored in the phone.
8 November 2004
White Paper J200
Services on the network
The J200 supports the SIM Application Toolkit
(online services), which makes it possible for operators to provide new services to existing users over
the air, including new menus and functions in the
phone.
Direct download links
The direct download link is a function designed to
encourage downloading of content via WAP to
enrich the user experience. Furthermore the
download link also tries to influence the user to use
WAP-based services and get used to using data
oriented services on the network. Direct download
links works with both GSM and GPRS.
The Fun&Games menu includes a Download link,
which directs the user to, for example, the Sony
Ericsson WAP site, where there are links to Pictures
and Sounds, available for download. Please note
that this menu is operator, network and
subscription dependent.
It is possible for operators to include an additional
link with their own URL and generic name for all
languages.
the phonebook. When that person calls, a particular ringtone is heard, and the name of the person
calling is shown in the display.
The pictures used for Caller ID can be:
• Any of the EMS pictures that come with the
phone.
• Pictures that have been received via EMS messages.
• Any operator-defined picture stored in My Pic-
tures.
• Pictures downloaded via WAP,
(for example from www.SonyEricsson.com/fun)
The J200 also supports name and number presentation as well as CLI restriction.
Shortcuts
It is easy to access the phone numbers in the
phonebook when you make a call. Just press and
hold down the button with the letter that the name
you are looking for starts with. You instantly enter
the phonebook and find the first name that starts
with that letter. Then you just scroll to find the name
you are looking for.
T9™ Text Input for quicker messaging
The J200 supports the predictive text input method
T9™ Text Input. Predictive text input makes it fast
and easy to write text messages. It works by
searching a word database to anticipate which
word you are writing. You only have to press each
key once, even if the letter you want is not the first
letter on the key. Of course, the J200 also lets you
add new words to the word database.
Phonebook
The phonebook is one of the most useful features
of mobile phones. The phonebook in the J200 lets
you save up to 200 entries. An additional number of
entries can be saved on your SIM card. The
number depends on what SIM card you are using.
Picture Phonebook - see who's calling!
The J200 lets you assign a picture or an icon stored
in the phone to an entry stored in the Phonebook.
When that person calls, a picture or an icon of your
choice is shown in the display as well as the name.
It is also possible to assign a ringtone to an entry in
Up-to-date with the calendar
The calendar of the J200 keeps you on the right
track. It has four different views: day, week, month
and the all tasks view.
Profiles
The profile feature is a group of settings preset to
suit a certain environment. The profiles are also
related to intelligent accessories such as a desktop
charger or a portable handsfree, useful for company integration with call forwarding. Some phone
accessories select a profile automatically. For
example, when you attach a portable handsfree to
your J200, the Port h-free profile is chosen. There
are seven pre-programmed profiles: Normal, Meet-
ing, In car, Outdoors, Port h-free (portable handsfree), Home, Office.
You cannot create more profiles, but you can
change the settings for a profile.
Alarm clock
The J200 has a built-in alarm clock, which can be
set to ring at a specific time within 24 hours, or
recurrently at a specific time on several days. You
9 November 2004
White Paper J200
can have both these alarms set at the same time.
Note that even if you have set your phone to silent,
the alarm signals ring. The alarm clock also rings if
the phone is turned off.
Auto time zone
The phone comes with an Auto time zone functionality. When this is enabled, you are prompted to
update the time when your phone changes network
and the time sent out from the network operator
differs from the time in your phone. If you press
Yes, the time is updated automatically. This functionality is useful while travelling abroad, across different time zones.
Packaging
The J200 is the first Sony Ericsson product to use
our new Entry level packaging concept. Based
upon a more compact box measuring 119 x 109 x
58 mm, this concept offers a small, neat package
that helps to promote the smallness and neatness
of the product itself. Moreover, the decreased
weight and volume results in less pallet space leading to reduced shipping costs and less storage
space.
10 November 2004
White Paper J200
Technologies in detail
11 November 2004
White Paper J200
Internet services
The built-in WAP browser gives the user portable, fast and secure access to a wide variety of services,
with the possibility of personalized services with new opportunities for business, individuals, and service
providers.
Using the Internet with J200
Push service
A useful feature for companies and service providers is to push content or service indications to work
groups or customers. This is used for notifications,
mail alerts, messaging, news, stock quotes, contacts, meeting requests, games and the like.
Provide settings
Using text messages, configuration settings can be
sent over the air, OTA, so that the user does not
need to configure the WAP access settings manually. WAP settings can also be customized by the
operator.
Adapt to phone type
When creating a WAP service, you want to make
sure that the user experience is what you intend,
regardless of client device type. The function User
Agent Profile is supported by the J200 to allow the
contents to be automatically optimized for the
phone.
Several bearer types
The J200 accesses WAP over a standard GSM
Data connection as well as over a GPRS connection (network-dependent services.)
Option key while browsing
During browsing, a press on the option key gives
the user immediate access to an option menu while
using WAP services, similar to right-clicking the
mouse in PC programs.
Bandwidth efficiency
One of the key advantages WAP has over textbased HTML pages on mobile devices, is the
bandwidth efficiency for communication. This is
due partly to the fact that the WAP application is
communicated to the wireless devices in the form
of binary encoded data.
Easy create for WAP
Creating a WAP service is no harder than creating
an intranet/Internet service today since WML and
WMLScript are based on well-known Internet technology. New market segments can be addressed
by launching innovative mobile Value Added Services.
Using standard tools
It is possible for the service creator to use standard
tools like ASP or CGI to generate content dynamically. You can utilize existing investments in databases that are the basis of existing Internet
services. Create a service once and make it accessible on a broad range of wireless networks.
Maintain customer base
You can adapt existing Internet services to WAP.
The actual binary encoding can be handled by the
WAP Gateway which makes it possible to create
WAP applications using the text-based language
WML and other tools. In fact, existing HTML-based
applications on the Internet can be viewed in the
WAP browser, if an automatic conversion is performed in the WAP Gateway.
12 November 2004
White Paper J200
Improve productivity
Improve and simplify the communication flow
within an organization by making information available to mobile users. A company or organization
can use a WAP gateway to provide a secure connection to the company network for their users.
The WAP profiles
The J200 holds up to five WAP profiles, each with a
group of network settings and a home page. If you
provide a corporate WAP service on your Intranet,
it is useful to enter an Intranet WAP profile in user
phones. The WAP profile holds network settings
Bearer type characteristics
The J200 accesses WAP services over IP. IP can be
provided either over GSM Data or GPRS, depending on network services.
Typical differences that distinguish the bearer types
are listed below.
GSM data access
• Circuit connection of data calls, means that the
phone is connected during the entire WAP session.
• Pricing is comparable to that of data calls in the
network.
and user identification. Users can easily switch
between corporate services and WAP services on
the Internet, simply by switching WAP profile.
Connection-orientated WAP
The J200 supports connection-oriented WAP over
GSM as well as GPRS data. In general, this means
that the connection between the WAP browser in
the phone and the WAP Gateway is maintained in a
session with error recovery services. This provides
high reliability with a reduced risk of errors in transmission, and improves efficiency in WAP browsing.
GPRS access
• The connection is maintained “constantly”, with
data transmitted in packets, and transmission
capacity of the application in use on an asneeded basis.
• GPRS offers higher transmission speed than
with GSM Data or SMS access.
• Pricing of GPRS can be dependent on the
actual use of bandwidth, which means the user
is charged for the volume of data transmitted,
rather than the duration of the connection.
• While transmitting large amounts of data, bandwidth can be increased automatically to allow
faster transmission speed.
Security using WAP
The J200 supports WAP 1.2.1, a version of the
Wireless Application Protocol that includes WTLS
class 2.
• Ideal for complex pull services, browsing, data
transfer, provisioning, pager services, messaging services, info services, push initiations.
While using certain WAP services, the user may
want more security than normal, for example when
using banking services. The user establishes a
secure connection between the phone and the
WAP gateway.
13 November 2004
White Paper J200
To use such secure connections, certificates have
to be saved in the phone. The J200 comes with a
number of pre-installed WAP certificates, so called
trusted certificates.
WTLS class 2 includes the following security features:
• Encryption of a message, ensuring that only the
• Server authentication, meaning that the mes-
Configuration of WAP settings
An easy way to perform the WAP configuration of a
single phone is by using the Sony Ericsson stepby-step WAP configurator. The configurator utilizes
OTA provisioning, and is available on
www.SonyEricsson.com
A manual configuration is made using the menu
system in the phone. This is described in the user
guide.
To simplify configuration of WAP settings in a
number of phones, all settings can be sent as an
SMS message to each phone. This makes it easy
for an operator, a service provider or a company to
distribute settings for Internet/intranet, and WAP,
without having to configure each phone manually.
• The OTA configuration message is distributed
via SMS point-to-point.
; no login required.
• The setup information is a binary encoded XML
• The user is not alerted about new settings until
• The necessary user interaction is limited to
• Security can be handled using a keyword identi-
sender and the recipient can read the contents
of a message.
sage is encrypted and users can verify that they
really are communicating with the WAP gateway
they believe they are connected to.
message, according to WBXML. To receive
information about OTA specifications, please
contact your local Sony Ericsson representative
for consumer products.
the ongoing browsing session ends. Furthermore, settings are not changed during an ongoing browsing session.
receiving and accepting/rejecting the configuration message, and selecting the WAP profile to
allocate the settings to.
fier displayed on the screen as a shared secret
between the SMS sender and recipient. It is
important that the user can verify that the configuration message is authentic.
Push services
These are useful for sending updated WAP site
contents or WAP links to mobile users. Examples
of services that can be implemented using push
services:
• Notification of new voice mails. Instant messaging and chat.
• News, sport results, weather forecasts, financial
information (such as stock quotes).
• Fill up a smart card with e-cash.
• Interactive games, for example, play poker with
a friend.
In the J200, the user selects whether to allow push
messages or not. There are two different forms of
Push services:
Service Indication (SI)
This is basically a text message to the user containing a link to a URL carried by the SI. If the user
decides to load the suggested URL, normal WAP
browsing commences.
Service Loading (SL)
This means that the WAP site content is immediately loaded and executed on the client, or alternatively is loaded and stored in the cache for later
use. In both cases, the SL is loaded without any
user intervention.
When a service indication is received in the J200, it
is presented to the user in one of the following
ways:
14 November 2004
White Paper J200
•High
Immediately displays the message irrespective
of current activity.
•Medium
Message is immediately displayed, unless the
user is engaged in another activity. In this case
the message is indicated to the user, who
retrieves it later from the inbox.
•Low
WAP with GPRS
The mobile Internet offers much more than mobile
access to the Internet – it opens up a whole new
range of situation-based services. Services that
give us access to personalized communications,
information and entertainment anytime, anywhere.
With the J200, the mobile Internet is always with
you. The default address for non-customized products is the address to the Sony Ericsson WAP site.
Message is not immediately displayed. Instead
it is put in the Inbox, and an indication is given
in the standby screen.
In the J200 push message inbox, a list shows the
first part of each received message, newest first.
The user decides to read or delete the message,
and whether to load the suggested URL in the WAP
browser.
This address can be changed by the user, who may
also add his or her own bookmarks to favourite
WAP sites. Operators can take advantage of the
customization possibilities offered by Sony Ericsson, and have the address of their own WAP site
assigned instead.
Data connections
In order to browse via WAP, the user must have a
data communication connection configured in the
phone. This connection contains specific settings
and parameters to connect to an appropriate
server. Several data connections can be saved in
the J200. To make it easier for the user, data connections can be provided by the operator via OTA
provisioning. For more information about configuration of WAP settings, see “Configuration of WAP
settings” on page 14.
Advantages of data connections include:
• Once the data connections are defined and
named, the user does not have to enter the settings for the connection again.
• Data connections can be re-used at any time.
• Individual data settings for working with WAP
can be stored and activated as needed.
• Data connections can be used for both GSM
Data and GPRS connection settings.
• Bearer type for WAP and corresponding bearerspecific parameters may be selected.
• Data connections contain the necessary settings for the Internet access point, including
modem pool phone number or IP address, user
ID and password.
15 November 2004
General Packet Radio Services
White Paper J200
The introduction of GPRS (General Packet Radio
Services) is one of the key steps in the evolution of
today’s GSM networks for enhancing the capabilities of data communication. Data traffic is increasing enormously (over both wired and wireless
networks), with the growth in demand for Internet
access and services paralleling that for mobile
communications.
The demand for high-speed Internet access will be
the key driver for coming generations of wireless
services, and GPRS can deliver the necessary
speed. GPRS allows creation of innovative services, makes it possible to address new and previously inaccessible market segments and increases
customer loyalty.
Using GPRS in the J200
Instead of occupying an entire voice channel for
the duration of a data session, the J200 sends/
receives data in small packets, as needed, much
like IP on the Internet. Because of this, the J200
maintains a constant online connection, its data
transmission abilities summoned by the application
in use on an as-needed basis.
The GPRS specification includes four coding
schemes – CS1, CS2, CS3 and CS4 – that allow
data speeds of 9,050 bps, 13,400 bps, 15,600 bps
and max 21,400 bps per slot, respectively. The
J200 works with all four coding schemes, but data
speed naturally varies according to network configuration. At the moment, CS-3 and CS-4 are not
supported in any live network, i.e, present speed is
limited to 53,600 bps.
The GSM system limits the ability to use all eight
time slots, so the J200 uses up to four time slots
for receiving data, and one slot for transmitting.
This means the speed for receiving data is up to
85,600 bps and up to 21,400 bps for sending data.
Using GPRS with the J200 has several advantages,
for example:
GPRS applications can be developed as both horizontal and vertical. Vertical applications are specific, including those for operations such as
reaching police and emergency, taxi, delivery or
automated services (vending machines, supervision, vehicle tracking). Horizontal applications are
more generic and include those for Internet access,
e-mail, messaging, e-commerce and entertainment.
GPRS is able to take advantage of the global coverage of existing GSM networks. Applications
developed for GPRS can be deployed on a large
scale and can reap the associated benefits. GPRS
also provides a secure medium for connections to
banking and financial services.
• Automatic access to increased bandwidth while
downloading large files such as pictures and
sounds
• Cost efficiency
• Use of transmission capacity only when needed
to reduce cost
• WAP over GPRS
• Access to Internet via WAP at high speed and
with a constant connection.
• Provide settings
• Receive GPRS configuration settings from the
provider over the air, OTA, making manual configuration unnecessary.
• User controlled settings
• Take advantage of full user control in the data
connections menu, establishing multiple
descriptions and accessing advanced settings
for GPRS.
Interruption of GPRS data account
When the user is using WAP via GPRS on the J200,
the GPRS connection is automatically disconnected when the user answers an incoming call.
However, when the call has ended, the user is
given the possibility to resume the WAP session.
• Constant connection
• High speed
16 November 2004
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