EXAM1_06 - Networks? List four problems. b) What are the...

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ECE4833: MOBILE AND WIRELESS NETWORKS SPRING 2006 EXAM 1: February 16, 2006 Dr. Ian F. Akyildiz Ken Byers Distinguished Chair Professor in Telecommunications Broadband and Wireless Networking Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology; Atlanta, GA 30332 Tel.: 404-894-5141; Fax.: 404-894-7883; E_Mail: ian@ee.gatech.edu THIS IS A CLOSED BOOK TEST!! ALL QUESTIONS HAVE THE SAME WEIGHT. PLEASE WRITE YOUR NAME AND CODEWORD ON EVERY SHEET!!! Question 1. a) Which component of sensor nodes is the most power consuming? b) What are couple options/mechanisms/ways to reduce/save power consumption for this component? Question 2. a) Why can't we use FLOODING to solve routing problems in Wireless Sensor
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Unformatted text preview: Networks? List four problems. b) What are the shortcomings of the LEACH algorithm? Question 3. a) What are the problems with S-MAC? b) Which error control (FEC or ARQ) will you use for Wireless Sensor Networks and why? Explain your reasons. Question 4. a) What is the basic idea of DSR, i.e., how are the paths established (discovered), e.g., what control packets are used? b) What does RERR message do in DSR? c) How does the Route Caching idea reduce the overhead in DSR? d) How are the paths maintained in DSR, i.e., how can a path/link break can be determined/discovered? Question 5. a) What are the basic differences between DSR and AODV? b) Why sequence numbers are used in AODV?...
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