Keral University B.Tech Computer Science 2008 Scheme Eigth Semester Mobile and Wireless Networks (Elective-iii) Previous Question

Eigth Semester B.Tech. Degree Examination, April 2014

(2008 Scheme)

08.805(3) MOBILE AND WIRELESS NETWORKS (ELECTIVE-III) (R)

PART-A

Answer all questions.Each qestion carries 4 marks.

1. What are the main problems of signal propagation?
2. Who performs MAC algorithm for SDMA? Whatcould be possible roles of mobile stations, bus stations and planning from the network provider ?
3. What are benefits and disadvantages of reservation schemes?
4. Which type of different services does GSM offer? Give some examples and reasons why these services have been separated?
5. What are typical data rates in DECT? How are they achieved considering the TDMA frames?
6. How do inclination and elevation determine the use of a satellite?
7. Why is the PHY layer in IEEE 802.11 subdivided? What about HiperLAN2 and Bluetooth?
8. How does registration on layer 3 of a mobile node work?
9. What are general problems of mobile IP regarding security and support of quality of service?
10. How can DHCP be used for mobility and support of mobile IP?

PART-B

Answer one full question from each Module.Each full question carries 20 marks.

MODULE-I

11.a) What are the main reasons for using cellular systema? How is SDM typically realized and combined with FDM?

    b) Discuss about the different modulation schemes?

12. Compare SDMA,TDMA,FDMA  and CDMA?

MODULE-II

13.a) Discuss about the different GSM services?

     b) Comapre IEEE 802.11, HiperLAN@ and Bluetooth with regard to their ad-hoc capabilities.

14.Discuss about the different capacity allocation schemes in satellite transmission?

MODULE-III

15.Discuss about the different file systemms used in mobile and wireless enviornments?

16.Explain the problems faced by HTTP in wireless networks.