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All Q&A
1

Write short note on Call setup of GSM network for mobile-to-mobile call.

 29 January, 2025
GSM (Global System for Mobile Communications), is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe protocols for second generation (2G) digital cellular networks used by wireless phones.
2

What is spread spectrum technique? Name two standard spread spectrum techniques and state the main difference in their principles of operation.

 29 January, 2025
Spread-spectrum techniques are methods by which an electrical, electromagnetic, or acoustic signal generated with a particular bandwidth is deliberately spread in the frequency domain,
3

What are tunnelling and encapsulation in the context of mobile IP?

 29 January, 2025
The encapsulation process creates a logical construct called a tunnel between the device that encapsulates and the one that decapsulates.
4

Draw the system architecture of GSM and explain the functionality of HLR and VLR. Why is the cell structure supposed to be a hexagon in a mobile network?

 29 January, 2025
The GSM network can be divided into five main groups: 1) Mobile station(MS): It include mobile equipment(ME) and the subscriber identity module(SIM)
5

Explain the concept of frequency reuse in cellular systems. 

 29 January, 2025
Frequency reuse is the process of using the same radio frequencies on radio transmitter sites within a geographic area that are separated by sufficient distance to cause minimal interference with each other.
6

What do you mean by co-channel interference and system capacity? 

 29 January, 2025
Co channel interference is the interference between two access points(APs) or base stations operating at the same frequency.
7

Discuss the three different mechanisms to improve the cell capacity and coverage area in a cellular system.

 29 January, 2025
When a cells capacity is no longer able to provide an acceptable QOS, several methods can be to increase system capacity.in areas where there is poor reception of radio signals, the use of repeaters can improve radio coverage
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