 general packet radio service (gprs) is a packet oriented mobile data service on the 2g and 3g cellular communication system's global system for mobile communications (gsm). gprs was originally standardized by european telecommunications standards institute (etsi) in response to the earlier cdpd and i-mode packet-switched cellular technologies. it is now maintained by the 3rd generation partnership project (3gpp).etsi3gpp gprs usage is typically charged based on volume of data transferred, contrasting with circuit switched data, which is usually billed per minute of connection time. usage above the bundle cap is either charged per megabyte or disallowed. gprs is a best-effort service, implying variable throughput and latency that depend on the number of other users sharing the service concurrently, as opposed to circuit switching, where a certain quality of service (qos) is guaranteed during the connection. in 2g systems, gprs provides data rates of 56â114 kbit/second.general packet radio service from qkport 2g cellular technology combined with gprs is sometimes described as 2.5g, that is, a technology between the second (2g) and third (3g) generations of mobile telephony.mobile phone generations from it provides moderate-speed data transfer, by using unused time division multiple access (tdma) channels in, for example, the gsm system. gprs is integrated into gsm release 97 and newer releases. == technical overview ==  the gprs core network allows 2g, 3g and wcdma mobile networks to transmit ip packets to external networks such as the internet. the gprs system is an integrated part of the gsm network switching subsystem. === services offered === gprs extends the gsm packet circuit switched data capabilities and makes the following services possible: * sms messaging and broadcasting * "always on" internet access * multimedia messaging service (mms) * push to talk over cellular (poc) * instant messaging and presenceâwireless 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 mes
1997_introductions 3GPP_standards Link_protocols