B.TECH - Semester 8 mobile and wireless networks Question Paper 2019 (nov)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Why do radio waves not always follow a straight line?
- Show the waveform corresponding to the bit pattern 100111010001 using Minimum Shift Keying.
- What are the main benefits of a spread spectrum system?. How can spreading be achieved?
- Discuss the mechanism "DFWMAC-PCF with polling" with neat sketch.
- Why are so many different identifiers/addresses needed in GSM?
- Discuss the different states of a Bluetooth device.
- How do inclination and elevation determine the use of a satellite?
- How does registration on layer 3 of a mobile node work?
- Differentiate I-TCP from Snooping TCP.
- How is unnecessary overhead avoided when using WSP on top of WTP for web browsing? ( $\mathbf{1 0} \boldsymbol{\times} \mathbf{4} \boldsymbol{=} \mathbf{4 0}$ Marks) P.T.O. Answer one question from each Module.
- (a) Briefly explain the techniques used to mitigate narrowband interference? What are the complexities of the different solutions?
- (b) Explain the following TDMA techniques:
- (i) $\mathrm{CSMA} / \mathrm{CA}$ (ii) MACA (iii) PRMA (iv) DAMA
- (a) Consider a CDMA system in which users $A$ and $B$ use the codes ( 01010101 ) and ( 00110011 ) respectively.
- (i) Show the output at the receiver if A transmits a data bit 0 and B transmits a data bit 1 . Assume the B's strength is two times A's Strength. This can be represented by showing the received signal component from A as consisting of elements of mag...
- (b) Explain about different modulation techniques used in wireless communication with suitable example.
- (a) Give reasons for a handover in GSM and the problems associated with it. Explain the different types of handover.
- (b) Briefly explain IEEE 802.11 Synchronization and power management mechanisms for infra structure based and infrastructure less networks.
- (a) Illustrate the system and protocol architecture of DECT.
- (b) Show how Digital Video Broadcasting facilitates high speed Internet access and mobile TV.
- (a) Draw the packet flow from a fixed host to a mobile host via a foreign agent. Then a handover takes place. What are the following actions of mobile IP?
- (b) What are the issues in MANET routing? Discuss any one of the routing algorithms with an example.
- (a) Explain WTA logical architecture and interaction among WTA's elements with neat sketch.
- (b) What is the reaction of standard TCP in case of packet loss? How is packet loss handled In case of wireless network? $$ (3 \times 20=60 \text { Marks }) $$