Modes of GPRS
- Application mode
- Tunneling mode
- Class A
- Class B
- Class C
GPRS device type
Network service in GPRS
Data services in GPRS
Applications of GPRS
A wide range of corporate and consumer
applications are enabled by GPRS services. A user is
likely to use either of two modes of GPRS network.
In this mode user will be using the GPRS mode phone to
access the applications running on the phone itself.
The phone acts as the end user device.
All GPRS phones have WAP browser as an embedded
application. This browser allows browsing of WAP sites.
The device operating executed environments supported are
Application can be developed in C/C++ or java.
Tunneling mode is for mobile computing where the user will
use the GPRS interface as an access to the network.
The end user device will be a large footprint device like
laptop computer or small footprint device like PDA.
The mobile phone will be connected to the device and used
as modem or cable to access the wireless data network.
GPRS terminal can be one of the three classes
Supports GPRS data and other GSM services simultaneously.
Simultaneous attach, activation, monitor and traffic.
Can make or receive calls on two services simultaneously.
SMS is supported. SMS can be received while call or data
service in progress.
Can support only one of these services at any time.
Can support simultaneous attach, activation, and
monitoring but not simultaneous traffic.
Users can make or receive calls on either a packet or a
switched call type sequentially but not simultaneously.
SMS is supported
Supports only non-simultaneous attach.
The user must select which service to connect to.
Therefore, a class c terminal can make or receive calls
from only the manually selected network service.
SMS is optional when data service enable .
MODE ATTACHED TO SUPPORT
Class A Both GPRS and GSM
attach + monitor + traffic
Both GPRS and GSM
Only operate one set of
service at a time
Either GPRS or GSM
Alternate use only
Numeric keypad and
built-in voice, icon drive
screen, built-in keyboard
Bearer services of GPRS offer end-to-end packet
switched data transfer.
GPRS supports two different kinds of data transport
BEARER services in GPRS
Point - To - Point service (PTP)
Point - To - Multipoint service (PTM)
Point-To-Point (PTP) services
- transfer of data packets between two user
Point-To-Multipoint (PTM) services
- transfer of data packets from single user to multi- user
PTM - M PTM - G
PTM- M : Multipoint Multicast service to all subscribers in
a given area
PTM- G : Multipoint Group service to pre- determined
group that may be dispersed over a geographic area.
DATA SERVICE IN GPRS
GPRS offered the following data services
Short message service was originally designed for GSM
GPRS will continue to support SMS as a bearer.
If SMS over GPRS, it is achieved 30 message per minute.
In GSM only 6 to 10 messages achieved.
MMS is Multimedia Messaging Service.
This is the next generation messaging service.
MMS supports multimedia messages.
MMS uses WAP and SMS .
Video, audio, picture or clips can be sent through MMS.
WAP is Wireless Application Protocol.
It is data bearer service over HTTP protocol.
WAP uses WML and WAP gateway.