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GPRS Interview Questions and Answers

1
Explain GPRS
  • Short form of General Packet Radio System
  • GPRS is the next generation of GSM, and the basis of the 3G networks
  • A packet oriented data service available to users of GSM and IS-136 type mobile phones
  • It complements the existing services like circuit-switched cellular phone connections and the SMS
  • Shortest set-up time is added for ISP connections
  • An optimized mobile service for sending and receiving information across a mobile telephone network, with less cost
  • GPRS provides data rates of mobile telephony and moderate speed data transfer, using unused TDMA channels
  • GPRS does not need dial-up modem connection
  • Sending and receiving e-mails, surfing internet are among the
2
What is Packet switching?

Packet switching is a digital networking communications method that groups all transmitted data, irrespective of content, type, or structure, into suitably sized blocks, called packets. Packet switching features delivery of variable bit rate data streams (sequences of packets) over a shared network. When traversing network adapters, switches, routers and other network nodes, packets are buffered and queued, resulting in variable delay and throughput depending on the traffic load in the network.

3
What is Mobile phone?

A mobile phone is an electronic device used for mobile telecommunications over a cellular network of base stations known as cell sites. Mobile phones differ from cordless telephones, which only offer telephone service within limited range through a single base station attached to a fixed line, for example within a home or an office. Low-end mobile phones are often referred to as feature phones, whereas high-end mobile phones that offer more advanced computing ability are referred to as smartphones.

4
What gross data rate does GPRS provide?
  • GPRS provide gross data rate of 22.80 KBPS / time slot
  • Voice uses only 13KBPS/ time slot and the rest is consumed by Error Correction Code
  • Error connection code is utilized for detecting and correcting the transmission errors
  • As voice is compressed, the usage of Error connection code is mandatory
5
What is the Speed of GPRS?

GPRS is packet switched. Higher connection speeds are attainable at around 56-118 kbps, a vast improvement on circuit switched networks of 9.6 kbps. By combining standard GSM time slots theoretical speeds of 171.2 kbps are attainable. However in the very short term, speeds of 20-50 kbps are more realistic

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