Wireless Future - Evolution -> 2.5G (2.5 generation of mobile networks)

In many ways, second-generation systems have come about because of fundamental weaknesses in first-generation technologies. First-generation technologies have limited system capacity, they have very little protection against fraud, they are subject to easy eavesdropping, and they have little to offer in terms of advanced features. Second-generation systems are designed to address all of these issues, and they have done a very successful job.

Systems like IS-95, GSM, and IS-136 are much more secure; they also offer higher capacity and more calling features. They are, however, still optimized for voice service and they are not well suited to data communications.

GPRS (General Packet Radio Service) is a step between GSM and

3G cellular networks. GPRS offers faster data transmission via a GSM network within a range 9.6Kbits to 115Kbits. This new technology makes it possible for users to make telephone calls and transmit data at the same time.

Before introduction of GPRS, the radio capacity was used for calls and data transmission within the GSM network in a rather inefficient way. For data transmission the entire channel was occupied and was thus insufficiently used. With the GPRS technology, the channel is used more efficiently owing to the possibility of more than one user sharing the same channel. GPRS telephones use several channels for data transfer thus facilitating greater transfer speeds.


<<< 2G (2nd Generation Digital networks) 3G (3rd generation mobile networks) >>>

HSDPA, LBS, WAP, J2ME, SMS, GPRS, 3G, GSM, Bluetooth, MExE, Mobitex, Wi-Fi, VoIP WiMAX Wireless News

Advertise @ m-indya.com Forum