Rajasthan Technical University 2010-7th Sem B.Tech Information Technology B-Tech.- , (main/back) , KOTA, - Question Paper

7E4103
B-tech. - VII sem. (main/back) Examination, December-2010
Branch- info Technology
7IT4- WIRELESS COMMUNICATION
Instruction to candidates:
Attempt overall 5 ques.. Internal option is indicated. All ques. carry equal marks. (Schematic diagrams must be shown wherever necessary. Any data you feel missing May suitably be presumed and said clearly. Units of volumes used/calculated must be said clearly.)
UNIT -1
Q.1. (a) elaborate the design consideration in Mobile Wireless TDMA Time slot? discuss in detail. (8)
(b) discuss the 1G, 2G, 2.5G AND 3G technologies for cellular mobile communication. (8)
OR
Q.1. (a) A mobile subscriber is situated at 1.0 km distance from the base station, it now moves away from the base station at a speed of 20km/hr. compute the propagation path loss in dB after 18 minutes. presume the path loss exponent n= 3.86. (8)
(b) discuss the cellular revolution process. (8)
UNIT-2
Q.2. (a) Compare MMDS and LMDS for WLL services. (8)
(b) Draw and discuss IEEE 802.16 frame format. (8)
OR
Q.2. (a) Compare the cordless system with GSM technology. (8)
(b) discuss the important expect of mobile IP. (8)
UNIT-3
Q.1. (a) A satellite at a distance of 40,000 km from a point on the earth's surface radiates a power of three watt from an antenna with a gain of 18 dB in the direction of the observer. obtain the flux density at the receiving point and the power received by the antenna with an effective area of 10 m2. (8)
(b) If the satellite in (Q.3.-a) operates at a frequency of 11 GHz, the receiving antenna has a gain of 52.3 dB. obtain the received power. (8)
OR
Q.3. (a) discuss GEO, MEO and LEO satellite on the basis of orbital parameters and their applications. (8)
(b) discuss routing, localization and handover in satellite communication. (8)
UNIT-4
Q.4. (a) discuss the various principles of cyclic repetition of data (CRD). (8)
(B) Explain, how can we access internet using DVB (Digital Video Broadcasting). (8)
OR
Q.4. (a) discuss the system architecture of the Digital Video Broadcasting (DVB). (8)
(b) GSM and next generation GSM can both transfer data. Compare these approaches with DAB and list the reasons for and against the use of DAB. (8)
UNIT-5
Q.5. (a) discuss IEEE 802.11 MAC data frame structure. (8)
(b) explain the HIPERLAN family of wireless networks. How are HIPERLAN standards various from IEEE 802.x standards? (8)
OR
Q.5. (a) What is Bluetooth technology? discuss the packet/ frame format for a Bluetooth device. (8)
(b) discuss the requirements and applications of wireless LAN. (8)

Earning:   Approval pending.