Sony Ericsson K700 Benutzerhandbuch
White Paper
K700
20
February 2004
Connectivity
Positioning
The basic cost-efficient positioning method
available in 2G networks relies on measuring
round-trip time. In 2G it is called Cell-ID + TA
(Timing in Advance).
available in 2G networks relies on measuring
round-trip time. In 2G it is called Cell-ID + TA
(Timing in Advance).
Time difference measurement, involving several
base stations, can be used to obtain a more
accurate position.
base stations, can be used to obtain a more
accurate position.
Positioning methods are already used to support
location-based information services such as
©YellowPages, restaurant guides, traffic
information, directions and friend finder
applications. Typically WAP, SMS or voice has been
used as delivery mechanisms. Java and MMS will
add new possibilities to deliver attractive location-
based applications.
location-based information services such as
©YellowPages, restaurant guides, traffic
information, directions and friend finder
applications. Typically WAP, SMS or voice has been
used as delivery mechanisms. Java and MMS will
add new possibilities to deliver attractive location-
based applications.
GPRS
The introduction of GPRS was a big step in the
evolution of the GSM networks for enhancing the
capabilities of data communication. Data traffic has
increased (over both wired and wireless networks),
with the growth in demand for Internet access and
services paralleling that of mobile communications.
evolution of the GSM networks for enhancing the
capabilities of data communication. Data traffic has
increased (over both wired and wireless networks),
with the growth in demand for Internet access and
services paralleling that of mobile communications.
We can now see that the demand for fast Internet
access is the key driver for coming generations of
wireless multimedia and entertainment services.
access is the key driver for coming generations of
wireless multimedia and entertainment services.
GPRS is able to take advantage of the global
coverage of existing GSM networks. Applications
developed for GPRS have been deployed on a
large scale and have thus reaped the associated
benefits.
coverage of existing GSM networks. Applications
developed for GPRS have been deployed on a
large scale and have thus reaped the associated
benefits.
With a GPRS subscription, transmission capacity is
only used when data “packets” are sent or received
via a connection.
only used when data “packets” are sent or received
via a connection.
Instead of occupying an entire voice channel for
the duration of a data session, the K700 sends and
receives data in small packets, as needed, much
like IP on the Internet. Thanks to this, the phone
appears to be always online, using transmission
capacity only when data is sent or received. The
phone is compatible with GPRS R97.
the duration of a data session, the K700 sends and
receives data in small packets, as needed, much
like IP on the Internet. Thanks to this, the phone
appears to be always online, using transmission
capacity only when data is sent or received. The
phone is compatible with GPRS R97.
The phone uses up to four time slots for receiving
data, and two slots for transmitting.
data, and two slots for transmitting.
Phone identity information and characteristics of
the connection are described in the PDP (Packet
Data Protocol) context. This information is stored
both in the phone and in the mobile network, so
that each phone is identified and “visible” to the
system.
the connection are described in the PDP (Packet
Data Protocol) context. This information is stored
both in the phone and in the mobile network, so
that each phone is identified and “visible” to the
system.
Using GPRS has many advantages, for example:
•
Cost efficient
Use transmission capacity only when needed,
thus reducing costs.
Use transmission capacity only when needed,
thus reducing costs.
•
WAP over GPRS
•
Access the Internet via WAP at high speed.
•
E-mail over GPRS
Remain connected to an e-mail system while
reading and preparing messages, (which are
then sent at high speed).
Remain connected to an e-mail system while
reading and preparing messages, (which are
then sent at 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.
Transfer data and access the Internet or an
intranet with a PC, PDA or handheld device
connected via Bluetooth wireless technology,
infrared or cable.
•
Provide settings
Receive GPRS configuration settings from the
provider OTA (over the air), making manual con-
figuration unnecessary.
Receive GPRS configuration settings from the
provider OTA (over the air), making manual con-
figuration unnecessary.
•
User-controlled settings
Take advantage of full user control in the data
connections menu, establishing multiple
descriptions and accessing advanced settings
for GPRS.
Take advantage of full user control in the data
connections menu, establishing multiple
descriptions and accessing advanced settings
for GPRS.