Sony Ericsson T630 Benutzerhandbuch
White Paper
T630/T628
34
October 2003
and graphics on a portable device. That is why the
main applications driving Mobile Internet develop-
ment are e-mail clients and WAP browsers.
main applications driving Mobile Internet develop-
ment are e-mail clients and WAP browsers.
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 innovative services to be cre-
ated, enabling new and previously inaccessible
market segments to be addressed and increasing
customer loyalty.
the key driver for coming generations of wireless
services, and GPRS can deliver the necessary
speed. GPRS allows innovative services to be cre-
ated, enabling new and previously inaccessible
market segments to be addressed and increasing
customer loyalty.
GPRS applications can be developed as both hori-
zontal and vertical. Vertical applications are spe-
cific, including those for operations such as
reaching police and emergency, taxi, delivery or
automated services (vending machines, supervi-
zontal and vertical. Vertical applications are spe-
cific, including those for operations such as
reaching police and emergency, taxi, delivery or
automated services (vending machines, supervi-
sion, vehicle tracking). Horizontal applications are
more generic and include those for Internet access,
e-mail, messaging, e-commerce and entertain-
ment.
more generic and include those for Internet access,
e-mail, messaging, e-commerce and entertain-
ment.
GPRS is able to take advantage of the global cov-
erage 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
private networks, banking and financial services.
erage 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
private networks, banking and financial services.
With GPRS, the T630/T628 sends data in “pack-
ets” at a very high speed. The T630/T628 remains
connected to the network at all times, using trans-
mission capacity only when data is sent or
received.
ets” at a very high speed. The T630/T628 remains
connected to the network at all times, using trans-
mission capacity only when data is sent or
received.
Using GPRS in the T630/T628
Instead of occupying an entire voice channel for
the duration of a data session, the T630/T628
sends/receives data in small packets, as needed,
much like IP on the Internet. Because of this, the
T630/T628 maintains a constant online connection,
its data transmission abilities summoned by the
application in use on an as-needed basis.
the duration of a data session, the T630/T628
sends/receives data in small packets, as needed,
much like IP on the Internet. Because of this, the
T630/T628 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 21,400 bps respectively. The T630/T628 works
with all four coding schemes, but data speed will
naturally vary 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.
schemes – CS1, CS2, CS3 and CS4 – that allow
data speeds of 9,050 bps, 13,400 bps, 15,600 bps
and 21,400 bps respectively. The T630/T628 works
with all four coding schemes, but data speed will
naturally vary 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 T630/T628 uses up to four time
slots for receiving data, and one slot for transmit-
ting. This means the speed for receiving data is up
to 85,600 bps and up to 21,400 bps for sending
data.
time slots, so the T630/T628 uses up to four time
slots for receiving data, and one slot for transmit-
ting. 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 T630/T628 has several
advantages, for example:
advantages, for example:
•
Constant connection
•
Keep an open connection to an e-mail system
or the company network, staying online to
receive and send messages at all times. All con-
nection settings can be managed by using the
data connections feature.
or the company network, staying online to
receive and send messages at all times. All con-
nection settings can be managed by using the
data connections feature.
•
High speed
•
Gain access automatically to increased band-
width when downloading large files, images etc.
width when downloading large files, images etc.
•
Cost efficient
•
Use transmission capacity only when needed,
thus reducing costs.
thus reducing costs.
•
WAP over GPRS
•
Access the Internet via WAP at high speed and
with a constant connection.
with a constant connection.
•
E-mail over GPRS
•
Remain connected to an e-mail system while
reading and preparing messages, (which are
sent at a high speed).
reading and preparing messages, (which are
sent at a high speed).
•
Data communication
•
Transfer data and access the Internet or an
intranet with a PC, PDA or handheld device
connected via Bluetooth wireless technology,
infrared or cable.
intranet with a PC, PDA or handheld device
connected via Bluetooth wireless technology,
infrared or cable.
•
Data and voice
•
Maintain a data connection, for example, a con-
stant connection to an e-mail system when con-
ducting a voice call.
stant connection to an e-mail system when con-
ducting a voice call.
•
Provide settings
•
Receive GPRS configuration settings from the
provider over the air, OTA, making manual con-
figuration unnecessary.
provider over the air, OTA, making manual con-
figuration unnecessary.
•
User controlled settings