what is GPRS and how does it work?

Question

what is GPRS and how does it work?

Answer 1

GPRS (General Packet Radio Service) is the world's most ubiquitous wireless data service, available now with almost every GSM network. GPRS is a connectivity solution based on Internet Protocols that supports a wide range of enterprise and consumer applications. With throughput rates of up to 40 kbit/s, users have a similar access speed to a dial-up modem, but with the convenience of being able to connect from anywhere. GPRS customers enjoy advanced, feature-rich data services such as colour Internet browsing, e-mail on the move, powerful visual communications such as video streaming, multimedia messages and location-based services.



For operators, the adoption of GPRS is a fast and cost-effective strategy that not only supports the real first wave of mobile Internet services, but also represents a big step towards 3GSM (or wideband-CDMA) networks and services.

Answer 2

type www.wikipedia.org

General Packet Radio Service (GPRS) is a mobile data service available to users of GSM mobile phones. It is often described as "2.5G", that is, a technology between the second (2G) and third (3G) generations of mobile telephony. It provides moderate speed data transfer, by using unused TDMA channels in the GSM network. Originally there was some thought to extend GPRS to cover other standards, but instead those networks are being converted to use the GSM standard, so that is the only kind of network where GPRS is in use. GPRS is integrated into GSM standards releases starting with Release 97 and onwards. First it was standardized by ETSI but now that effort has been handed onto the 3GPP.



Contents [hide]

1 GPRS basics

1.1 GPRS speeds and profile

1.2 The GPRS Capability Classes

1.3 GPRS Multislot Classes

1.4 GPRS Coding

2 GPRS Services

3 GPRS in practice

3.1 GPRS cost structure examples

4 See also

5 External links







[edit]

GPRS basics

GPRS is different from the older mik-mac Circuit Switched Data (or CSD) connection included in GSM standards released before Release 97 (from 1997, the year the standard was feature frozen). In CSD, a data connection establishes a circuit, and reserves the full bandwidth of that circuit during the lifetime of the connection. GPRS is packet-switched which means that multiple users share the same transmission channel, only transmitting when they have data to send. This means that the total available bandwidth can be immediately dedicated to those users who are actually sending at any given moment, providing higher utilisation where users only send or receive data intermittently. Web browsing, receiving e-mails as they arrive and instant messaging are examples of uses that require intermittent data transfers, which benefit from sharing the available bandwidth.



Usually, GPRS data are billed per kilobytes of information transceived while circuit-switched data connections are billed per second. The latter is to reflect the fact that even during times when no data are being transferred, the bandwidth is unavailable to other potential users.



GPRS originally supported (in theory) IP, PPP and X.25 connections. The last has been typically used for applications like wireless payment terminals although it has been removed as a requirement from the standard. X.25 can still be supported over PPP, or even over IP, but doing this requires either a router to do encapsulation or intelligence built into the end terminal.

Answer 3

General Packet Radio Service. A packet-based air interface designed as a GSM overlay, permitting the use of GPRS as an optional data networking service on GSM-based networks, including interoperability with the wireline Internet. GPRS, which may also be implemented on non-GSM TDMA networks, can theoretically offer near-broadband data over mobile, but practical multi-user implementations are constrained to much lower throughput rates closer to dial-up Internet speeds.

Answer 4

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