White Paper
J300
18
July 2005
Connectivity
Positioning
The basic cost-efficient positioning method availa-
ble in 2G networks relies on measuring timing
advance time. In 2G it is called Cell-ID + TA (Timing
Advance).
Positioning methods are already used to support
location-based information services such as ©Yel-
lowPages, 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 possibil-
ities to deliver attractive location-based applica-
tions.
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.
We can now see that the demand for fast Internet
access is the key driver for coming generations of
wireless multimedia and entertainment services.
GPRS is able to take advantage of the global cov-
erage 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.
Instead of occupying an entire voice channel for
the duration of a data session, the J300 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.
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.
Using GPRS has many advantages, for example:
•
Cost efficient
Use transmission capacity only when needed,
thus reducing costs.
•
WAP over GPRS
•
Access the Internet via WAP at high speed.
•
Email over GPRS
Remain connected to an email 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 cable.
•
Provide settings
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.
