JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year MOBILE COMMUNICATIONS AND NETWORKS Previous Question Paper (February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
List the Limitations of Conventional Mobile Telephone Systems.
Answer
The primary limitations of conventional mobile telephone systems include: 1) Limited capacity due to a small number of available channels, and 2) Inability to provide service to a large number of users simultaneously, leading to high blocking probabilities.
Summarize the Microcell Zone Concept.
Answer
The Microcell Zone Concept divides a large cell into several smaller zones, each served by a zone base station connected to a single common base station. This allows for increased capacity by reusing frequencies within the same cell while reducing co-channel interference, as only the zone where the mobile is located transmits the signal.
Recall the concept of cross talks.
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Describe the Near end far end interference.
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List the merits of lee model.
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Outline the Cell Coverage for Signal and Traffic.
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Recall Handoffs.
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Outline Dropped Calls.
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List the features of Ad Hoc wireless Networks.
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Outline the Cellular networks.
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Part B
Categorize the generations of Cellular Wireless Systems.
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Examine the Co-Channel Interference Reduction Factor.
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Inspect how do you get Desired C/I from a Normal Case in a Omni Directional Antenna System.
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Identify the effects on coverage and interference by power decrease.
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Identify the effects on coverage and interference by antenna height decrease.
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Build the Design of Antenna System.
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Mention the Antenna Parameters and identify the effects on antenna system.
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Compare and contrast the phase difference between direct and reflected paths.
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Classify the frequency management techniques.
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Examine the mobile propagation over
Water and flat open area
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Near and long-distance propagation.
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Illustrate the following Handoffs:
Delaying Handoff
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Power Difference Handoff.
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Develop a mechanism for Dropped Call Rates and their Evaluation Criteria.
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Identify the advantages of Handoffs. Model the Intersystem Handoff.
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Elaborate the Issues in Ad Hoc Wireless Networks.
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Extend the applications of Ad Hoc Wireless Networks to other emerging areas.
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Elaborate the MAC Protocols for Ad Hoc Wireless Networks.
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