Wireless Master

General Packet Radio Service as GPRS stands for, is a mobile data service that’s packet oriented, and is available to the 2G and 3G cellular communication system users. GPRS gives 56- 114kbit/s data rates in 2G systems.

Transfer of data for the GPRS is charged typically for each megabyte of transferred traffic, whilst the connection time for data communication through circuit switching is billed each minute. The procedure does not change if a user is in an inactive status or is using the facility. GPRS guarantees a good quality connection for non-mobile users.

The combination of GPRS with 2G cellular systems are illustrated as 2.5G, a technology of mobile telephony that’s between the second and third generations. The usage of unused time division multiple access (TDMA) channels in, lets say, the GSM system, gives a reasonable data transfer. Previously there were thoughts of extending the GPRS to cover added standards, but the usage of the GSM standard is being implemented in those areas, which makes GPRS to be in use in the GSM network.

Circuit-switched data (CSD) and high-speed circuit-switched data (HSCSD) are the two other GSM technologies that deliver data services other than the GPRS. CSD and HSCSD establish a circuit dedicatedly unlike the shared nature of GPRS. HSCSD is preferred by an application like video calling, that’s when, between the endpoints there is constant data flow

Based on the frequency division duplex (FDD) and TDMA, the multiple access methods are used, in GSM with GPRS. Just one pair of up-link and down-link frequency channels in assigned to a user during a session. The possibility of several users to share the same frequency channel is due to the combination of packet mode communication. Corresponding to a GSM time slot the packets have constant length and the first-come first-served packet scheduling is used by the down-link whilst a scheme is used by the up-link that is like the reservation ALOHA (R-ALOHA). During a contention phase Slotted ALOHA (S-ALOHA) is used for reservation and the dynamic TDMA helps it transfer using the actual data with first-come first-served scheduling.

By reference to its access point name (APN) a GPRS connection is established. Services such as the World Wide Web access, wireless application protocol access, multimedia messaging service, email and short message service are defined by the APN.

A user must specify an APN, electively a password and a user name to set up a GPRS connection for a wireless modem.

GPRS connection presented maximum speed in the year 2003, which was similar to a modem connection in an analog wire telephone network. Round-trip time (RTT) often reaches 1 s, but is typically about 600-700 ms. The quality of the connection varies hugely and is typically prioritized lower than speech. And thus exactly quality varied hugely.
Devices with latency/RTT improvements are generally available. Also with certain operators a network upgrade of features. With these enhancements the active round-trip can be reduced in distinct increase in application-level throughput speeds