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2.5G Cellular Standards

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GauravBiswas9

This document provides an overview of 2.5G cellular standards, including HSCSD, GPRS, EDGE, IS-95B, and i-Mode. It discusses the evolution from 1G analog to 2G digital cellular technologies and how 2.5G served as an intermediate step between 2G and 3G. Key aspects covered include data transfer speeds and network upgrades needed for each 2.5G standard.

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Overview Of mobile Cellular Communication 2.5G Cellular Standards Presented By : GAURAV BISWAS (BIT MESRA) 4/5/2019 1
Index  Evolution of 2.5G technology  2.5G standards  HSCSD  GPRS  EDGE  IS-95B  i-Mode  References 4/5/2019 2
Evolution of 2.5G Technology  1980s, cellphones operated on analog 1G technology  Early 1990, Digital 2G technology became available on GSM standard  2.5G wireless technology was a steppingstone that bridged second- generation (2G) wireless technology and third-generation (3G) wireless technology 4/5/2019 3
Evolution of 2.5G Technology  The jump from 2G to 2.5 required just an upgrade over existing 2G infrastructures  It just needs compatible handsets and a few modifications to the base stations 4/5/2019 4
2.5 G standards  HSCSD  GPRS  EDGE  IS-95B  i-Mode 54/5/2019
HSCSD(High Speed Circuit Switched Data)  New high speed implementation of GSM  Four times faster than GSM (transfer rate : 57.6Kbps)  Operates across a GSM network(no extra hardware is required)  Requires software upgrade  Consecutive user time slots  ideal for dedicated streaming internet access or real-time interactive web sessions  Inefficient use of channels 64/5/2019
GPRS (General Packet Radio service)  Packet-based wireless communication service  Data rate : 171.2 Kbps  Provides continuous connection to the Internet  Cost users less than circuit-switched services  Upgraded network architecture(new network elements operates alongside the existing element) 74/5/2019
GPRS Architecture 4/5/2019 8 [1] : GPRS Architecture
GPRS (General Packet Radio service)  extension of existing 2G network  capacity of launching packet based services  packet switched domain in addition to circuit switched domain  data rates : 56 Kbps upto 384 Kbps  Provides secure communication 94/5/2019
Services  Multimedia Messaging Service (MMS)  Internet communication services : e-mail and World Wide Wireless Web (WWW) access  Data transfer is typically charged per megabyte of traffic transferred 10 4/5/2019
EDGE (Enhanced Data Rate for GSM Evolution)  upgrade to the existing GSM / GPRS networks  implemented as a software upgrade to existing GSM / GPRS networks  Data rate higher than GPRS(up to 384 kbps)  New network architecture entities that are needed for the EDGE upgrade are:  SGSN  GGSN  PCU 114/5/2019
EDGE  Uses 200 KHz bandwidth with 8 time slots  48 kbps data rate in each time slot  Requires advanced upgrades at BS  Lesser coverage area 4/5/2019 12
IS-95B  Evolution of IS-95  Initial specification for the system was IS95A, but its performance was later upgraded under IS-95B  Data rate: 115 Kbps  Improved voice quality  Enables a greater number of users to be supported as compared to TDMA and FDMA  CDMA system re-uses the same channels 134/5/2019
i-Mode (Internet Mode)  Evolved from PDC(Personal Digital Cellular)  Supports text, graphics, audio, and video for Web access  Packet-data transmission  i-Mode phone utilizes a micro-browser to browse i-Mode enabled site  i-Mode enabled website utilizes pages that are written in C-HTML 144/5/2019
References  http://www.ques10.com/p/17454/explain-with-neat-diagram-hscsd-network- architectu/  https://www.gktoday.in/gk/gprs/  http://wifinotes.com/mobile-communication-technologies/hight-speed- circuit-switched-data.html 154/5/2019
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2.5G Cellular Standards

  • 1. Overview Of mobile Cellular Communication 2.5G Cellular Standards Presented By : GAURAV BISWAS (BIT MESRA) 4/5/2019 1
  • 2. Index  Evolution of 2.5G technology  2.5G standards  HSCSD  GPRS  EDGE  IS-95B  i-Mode  References 4/5/2019 2
  • 3. Evolution of 2.5G Technology  1980s, cellphones operated on analog 1G technology  Early 1990, Digital 2G technology became available on GSM standard  2.5G wireless technology was a steppingstone that bridged second- generation (2G) wireless technology and third-generation (3G) wireless technology 4/5/2019 3
  • 4. Evolution of 2.5G Technology  The jump from 2G to 2.5 required just an upgrade over existing 2G infrastructures  It just needs compatible handsets and a few modifications to the base stations 4/5/2019 4
  • 5. 2.5 G standards  HSCSD  GPRS  EDGE  IS-95B  i-Mode 54/5/2019
  • 6. HSCSD(High Speed Circuit Switched Data)  New high speed implementation of GSM  Four times faster than GSM (transfer rate : 57.6Kbps)  Operates across a GSM network(no extra hardware is required)  Requires software upgrade  Consecutive user time slots  ideal for dedicated streaming internet access or real-time interactive web sessions  Inefficient use of channels 64/5/2019
  • 7. GPRS (General Packet Radio service)  Packet-based wireless communication service  Data rate : 171.2 Kbps  Provides continuous connection to the Internet  Cost users less than circuit-switched services  Upgraded network architecture(new network elements operates alongside the existing element) 74/5/2019
  • 8. GPRS Architecture 4/5/2019 8 [1] : GPRS Architecture
  • 9. GPRS (General Packet Radio service)  extension of existing 2G network  capacity of launching packet based services  packet switched domain in addition to circuit switched domain  data rates : 56 Kbps upto 384 Kbps  Provides secure communication 94/5/2019
  • 10. Services  Multimedia Messaging Service (MMS)  Internet communication services : e-mail and World Wide Wireless Web (WWW) access  Data transfer is typically charged per megabyte of traffic transferred 10 4/5/2019
  • 11. EDGE (Enhanced Data Rate for GSM Evolution)  upgrade to the existing GSM / GPRS networks  implemented as a software upgrade to existing GSM / GPRS networks  Data rate higher than GPRS(up to 384 kbps)  New network architecture entities that are needed for the EDGE upgrade are:  SGSN  GGSN  PCU 114/5/2019
  • 12. EDGE  Uses 200 KHz bandwidth with 8 time slots  48 kbps data rate in each time slot  Requires advanced upgrades at BS  Lesser coverage area 4/5/2019 12
  • 13. IS-95B  Evolution of IS-95  Initial specification for the system was IS95A, but its performance was later upgraded under IS-95B  Data rate: 115 Kbps  Improved voice quality  Enables a greater number of users to be supported as compared to TDMA and FDMA  CDMA system re-uses the same channels 134/5/2019
  • 14. i-Mode (Internet Mode)  Evolved from PDC(Personal Digital Cellular)  Supports text, graphics, audio, and video for Web access  Packet-data transmission  i-Mode phone utilizes a micro-browser to browse i-Mode enabled site  i-Mode enabled website utilizes pages that are written in C-HTML 144/5/2019
  • 15. References  http://www.ques10.com/p/17454/explain-with-neat-diagram-hscsd-network- architectu/  https://www.gktoday.in/gk/gprs/  http://wifinotes.com/mobile-communication-technologies/hight-speed- circuit-switched-data.html 154/5/2019