GPRS Networks (PDF)

GPRS is a packet based wireless communication service that offers
data rates from 9.05 up to 171.2 Kbps and continuous
connection to the Internet for mobile phone and computer users.
GPRS is based on GSM communications and complements existing
services such as circuit switched cellular phone connections and
the Short Message Service (SMS).

GPRS represents the bridge between 2G and 3G mobile
telecommunications and is commonly referred to as 2.5G.

Implementation of GPRS requires modification of the existing GSM
networks in that GSM is a circuit switched technology while GPRS is
packet oriented. GPRS enables packet data (the same as is used by
an Ethernet LAN, WAN or the Internet) to be sent to and from a
mobile station - e.g. mobile phone, PDA or Laptop.

WAP and SMS can also be sent using GPRS and individuals working
with GPRS need to learn and understand how the mobile stations, the
air interface, network architecture, protocol structures and
signalling procedures must be modified.

GPRS offers much higher data rates than GSM and can be combined
with 3G technologies such as EDGE to give even higher bit-rates. It
offers many benefits for customers and network operators: such as
volume (rather then time) dependent billing and more efficient use
of network resources.

Due to the worldwide delay in implementing 3G solutions such as
CDMA and UMTS the demand for GPRS is still growing.

GPRS Networks:

* Offers detailed information ranging from standards to practical
implementation

* Answers 'how' and 'why' rather than just simply re-stating GPRS
specifications

* Provides comprehensive coverage in a single volume

Essential reading for all telecommunications project managers,
field engineers, technical staff in network operator and
manufacturing organisations, GPRS application and service
developers, Datacoms/IT engineers.

The comprehensive coverage also makes this a superb reference for
students of computer science, telecommunications and electrical
engineering.