General
Packet Radio Service is a packet-switching technology. GPRS was originally
standardized by European Telecommunications Standards Institute (ETSI).
GPRS, which supports a wide range of bandwidths,
is particularly suited for sending and receiving small bursts of data,
such as e-mail and Web browsing, as well as large volumes of data. In theory
the speed limit of GPRS is 115 kbps, but in most networks it is around 35 kbps.
Informally, GPRS is also called 2.5G. GPRS usage charging is based on volume of
data, either as part of a bundle or on a pay-as-you-use basis.
The GPRS core network provides mobility management,
session management
and transport for
Internet Protocol packet services in GSM and WCDMA (Wideband Code
Division Multiple Access) networks. It also provides support for
other additional functions such as billing
and lawful interception.
The
upload and download speeds that can be achieved in GPRS depend on a number of
factors such as:
- the number of BTS (base transceiver station (BTS) or cell site ) assigned by the operator
- the channel encoding used.
- the maximum capability of the mobile device
expressed as a GPRS multislot
class
Services
offered:
GPRS
extends the GSM Packet circuit switched data capabilities and makes the
following services possible:
- SMS messaging and broadcasting
- File manipulation functions
- Active process block process
- "Always on" internet access
- Multimedia
messaging service (MMS)
- Push to talk over cellular (PoC)
- Instant messaging
and presence—wireless village
- Internet applications for smart devices
through wireless
application protocol (WAP)
- Point-to-point
(P2P) service: inter-networking with the Internet (IP)
- Point-to-Multipoint
(P2M) service: point-to-multipoint multicast and point-to-multipoint group
calls
If
SMS over GPRS is used, an SMS transmission speed of about 30 SMS messages per
minute may be achieved. This is much faster than using the ordinary SMS over
GSM, whose SMS transmission speed is about 6 to 10 SMS messages per minute.
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