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# CS314 Assignment No 02 Fall 2019 Solution & Discussion Due Date: 02-12-2019

Objective:

To enhance the learning capabilities of the students about:

• GSM Specifications
• Frequency Distribution
• GSM Network Services
• GSM Architecture

Assignment

Question - 01

Consider a P-GSM network having uplink frequency range 890 – 915 MHz and downlink frequency range 935 - 960 MHz. The channel spacing in P-GSM is 200 KHz whereas the duplex spacing between the uplink and downlink frequency of a channel is 45 MHz. Considering the given scenario, answer the following questions:

1. What will be the total number of channels available to the network?
2. What will be the uplink and downlink frequency of channel number 50?

Note: Provide complete steps of calculation in both parts

Question - 02

Ali, who is a subscriber of Mobilink GSM, goes to Makkah to perform Umrah. He brings his phone with him so that he is able to stay connected with his relatives. Upon reaching Makkah, he notices that his phone is receiving the signals from a Zain Telecom instead of Mobilink. Not only this, Ali is still able to make and receive calls from/on his mobile through the network of Zain Telecom. Keeping into view the given scenario, answer the following questions.

1. Why is Ali’s mobile getting the signals of Zain Telecom network on Mobilink SIM?
2. Which network components will be used when Ali makes a call?
3. Explain the complete call setup process in this case.

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