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GLOBAL SYSTEM FOR MOBILE COMMUNICATION Presentation Transcript
1.GLOBAL SYSTEM FOR MOBILE COMMUNICATION
2. COMPANY PROFILE
Mahanagar Telephone Nigam Limited (MTNL) is a state-owned telecommunications service provider in the metro cities of Mumbai and New Delhi in India
“ Transparency makes us different “ is the motto of company
Founded in : 1986.
Chairman : A.K. GARG
Mahanagar Telephone Nigam Limited (MTNL) is a state-owned telecommunications service provider in the metro cities of Mumbai and New Delhi in India
“ Transparency makes us different “ is the motto of company
Founded in : 1986.
Chairman : A.K. GARG
3.Dolphin
Trump
Garuda
Broadband services
Fixed line services
Trump
Garuda
Broadband services
Fixed line services
4.GSM – Introduction
GSM Services
System Architecture
GSM Specification
Conclusion
GSM Services
System Architecture
GSM Specification
Conclusion
5. What is GSM ?
Global System for Mobile (GSM) is a second generation cellular standard developed to cater voice services and data delivery using digital modulation
Global System for Mobile (GSM) is a second generation cellular standard developed to cater voice services and data delivery using digital modulation
6.GSM Services
Tele- Services
Bearer or Data Services
Supplementary Services
Tele- Services
Bearer or Data Services
Supplementary Services
7.System Architecture
8. System Architecture Mobile Station (MS)
9. System Architecture Base Station Subsystem (BSS)
10.Base Transceiver Station (BTS)
Houses the radio transceivers that define a cell
Handles radio-link protocols with the Mobile Station
Speech and data transmissions from the MS are recoded
Houses the radio transceivers that define a cell
Handles radio-link protocols with the Mobile Station
Speech and data transmissions from the MS are recoded
11.Base Station Controller (BSC)
Manages Resources for BTS
Handles call set up
Location update
Handover for each MS
Manages Resources for BTS
Handles call set up
Location update
Handover for each MS
12.Mobile Switching Center (MSC)
Switch speech and data connections between:
Base Station Controllers
Mobile Switching Centers
GSM-networks
Other external networks
Heart of the network
Two main jobs:
1) connects calls from sender to receiver
2) collects details of the calls made and received
Switch speech and data connections between:
Base Station Controllers
Mobile Switching Centers
GSM-networks
Other external networks
Heart of the network
Two main jobs:
1) connects calls from sender to receiver
2) collects details of the calls made and received
13.
RF Spectrum
GSM 900
Mobile to BTS (uplink): 890-915 MHz
BTS to Mobile(downlink):935-960 MHz
Bandwidth : 2* 25 MHz
GSM 1800
Mobile to BTS (uplink): 1710-1785 MHz
BTS to Mobile (downlink) 1805-1880 MHz
Bandwidth : 2* 75 MHz
RF Spectrum
GSM 900
Mobile to BTS (uplink): 890-915 MHz
BTS to Mobile(downlink):935-960 MHz
Bandwidth : 2* 25 MHz
GSM 1800
Mobile to BTS (uplink): 1710-1785 MHz
BTS to Mobile (downlink) 1805-1880 MHz
Bandwidth : 2* 75 MHz
14. GSM Specification-II
Carrier Separation : 200 KHz
Duplex Distance : 45 MHz
No. of RF carriers : 124
Access Method : TDMA/FDMA
Modulation Method : GMSK
Modulation data rate: 270.833 Kbps
Carrier Separation : 200 KHz
Duplex Distance : 45 MHz
No. of RF carriers : 124
Access Method : TDMA/FDMA
Modulation Method : GMSK
Modulation data rate: 270.833 Kbps
15. CONCLUSION
GSM can be considered as the first serious attempt to fulfill the requirements for a universal personal communication system.
GSM is then used as a basis for the development of Universal Mobile Telecommunication System (UMTS).
GSM can be considered as the first serious attempt to fulfill the requirements for a universal personal communication system.
GSM is then used as a basis for the development of Universal Mobile Telecommunication System (UMTS).
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