23-11-2012, 02:10 PM
A Presentation On Telecommunication Technology
[attachment=40824]
GSM-Introduction
Global System for Mobile (GSM) is a second generation cellular standard developed to voice services and data delivery using digital modulation
GSM System Architecture
Mobile Station (MS)
Mobile Equipment (ME)
Subscriber Identity Module (SIM)
Base Station Subsystem (BSS)
Base Transceiver Station (BTS)
Base Station Controller (BSC)
Network Switching Subsystem(NSS)
Mobile Switching Center (MSC)
Home Location Register (HLR)
Visitor Location Register (VLR)
Authentication Center (AUC)
Equipment Identity Register (EIR)
System Architecture(Cont.) Mobile Station (MS)
Mobile Equipment
Portable,vehicle mounted, hand held device
Uniquely identified by an IMEI (International Mobile Equipment Identity)
Voice and data transmission
Monitoring power and signal quality of surrounding cells for optimum handover
Power level : 0.8W – 20 W
160 character long SMS.
SPEECH CODING:
In order to send our voice across a radio network, we have to turn our voice into a digital signal. GSM uses a method called RPE-LPC (Regular Pulse Excited - Linear Predictive Coder with a Long Term Predictor Loop) to turn our analog voice into a compressed digital equivalent.
CHANNEL CODING:
Once we have a compressed digital signal, we must add a number of bits for error control to protect the signal from interference. These bits are called redundancy bits.
Interleaving:
Interleaving is the processes of rearranging the bits. Interleaving allows the error correction algorithms to correct more of the errors that could have occurred during transmission
Multiple Access:
GSM uses a combination of both TDMA and FDMA techniques. The FDMA element involves the division by frequency of the (maximum) 25 MHz bandwidth into 124 carrier frequencies spaced 200 kHz.
The carriers are then divided in time, using a TDMA scheme. This enables the different users of the single radio frequency channel to be allocated different times slots. They are then able to use the same RF channel without mutual interference.
CONCULSIONS:
Thus I have learned about the whole technical system of Reliance Communication, Jaipur. Head office and Reliance MCN and learned about its functioning. During the training period I have learned various telecommunication technologies various parameters related to it. We also saw various antennas which are used for telecommunication.
Thus we learned about various aspects of telecommunication at Reliance Communication.
[attachment=40824]
GSM-Introduction
Global System for Mobile (GSM) is a second generation cellular standard developed to voice services and data delivery using digital modulation
GSM System Architecture
Mobile Station (MS)
Mobile Equipment (ME)
Subscriber Identity Module (SIM)
Base Station Subsystem (BSS)
Base Transceiver Station (BTS)
Base Station Controller (BSC)
Network Switching Subsystem(NSS)
Mobile Switching Center (MSC)
Home Location Register (HLR)
Visitor Location Register (VLR)
Authentication Center (AUC)
Equipment Identity Register (EIR)
System Architecture(Cont.) Mobile Station (MS)
Mobile Equipment
Portable,vehicle mounted, hand held device
Uniquely identified by an IMEI (International Mobile Equipment Identity)
Voice and data transmission
Monitoring power and signal quality of surrounding cells for optimum handover
Power level : 0.8W – 20 W
160 character long SMS.
SPEECH CODING:
In order to send our voice across a radio network, we have to turn our voice into a digital signal. GSM uses a method called RPE-LPC (Regular Pulse Excited - Linear Predictive Coder with a Long Term Predictor Loop) to turn our analog voice into a compressed digital equivalent.
CHANNEL CODING:
Once we have a compressed digital signal, we must add a number of bits for error control to protect the signal from interference. These bits are called redundancy bits.
Interleaving:
Interleaving is the processes of rearranging the bits. Interleaving allows the error correction algorithms to correct more of the errors that could have occurred during transmission
Multiple Access:
GSM uses a combination of both TDMA and FDMA techniques. The FDMA element involves the division by frequency of the (maximum) 25 MHz bandwidth into 124 carrier frequencies spaced 200 kHz.
The carriers are then divided in time, using a TDMA scheme. This enables the different users of the single radio frequency channel to be allocated different times slots. They are then able to use the same RF channel without mutual interference.
CONCULSIONS:
Thus I have learned about the whole technical system of Reliance Communication, Jaipur. Head office and Reliance MCN and learned about its functioning. During the training period I have learned various telecommunication technologies various parameters related to it. We also saw various antennas which are used for telecommunication.
Thus we learned about various aspects of telecommunication at Reliance Communication.