ST. ANN’S COLLEGE OF ENGINEERING & TECHNOLOGY
Department of COMPUTER SCIENCE & ENGINEERING
Subject: Mobile Computing Academic Year: 2012-2013
Faculty: Dr. P.Harini Class: IV-CSE-A & B
ASSIGNMENT-1
1.
a) With the help of a neat diagram, explain the Architectural reference model of wireless and mobile network?
b) What is electromagnetic spectrum? Which part of the spectrum is used for wireless and mobile communications? Consider all possibilities like building a network, cellular communications, and satellite networks etc
2.
a) Explain the applications of Mobile Computing?
b) Explain in detail about GSM Architecture?
3.
a) Explain the different generations of mobile telecommunications systems?
b) Explain the Services Provided by GSM System?
4.
a) What is handover? Why it is required? What are the handover scenarios in GSM? How the handover decision takes place depending on receiver signal strength?
b) Explain high speed circuit switched data transmission approach
5. a) Explain the Authentication & Data Encryption Process in GSM?
b) Explain the following Data Services provided by GSM?
i) HSCSD ii) GPRS
ASSIGNMENT-2
1.
Suggest a multiple access scheme which gives good performance in all situations.
2.
How starvation can be avoided in all multiple access schemes which you have studied.
Explain in detail.
3.
a) Explain how priority based multiple access schemes can be implemented. b) What is multiplexing? Why it is needed? What are the different kinds of
Multi-plexing techniques? Explain them
4.
Assume that there are N stations. Stations transmit without sensing the channel.
Under what conditions the performance f this scheme is good. When the perfor-
mance is poor. How carrier sensing helps to improve the situation. When carried
sensing helps little. What is the suggested solution then?
5. (a) How the reservations improve performance of time based multiple access schemes?

(b) What are the different reservation based multiple access schemes?
ASSIGNMENT-3
1.
(a) What are the entities that are part of mobile IP? Explain them with an
Example network?
(b) What is tunneling in mobile IP?
2 . (a) What is the role of Home agent and foreign agent in mobile IP?
(b) What are the two possibilities for location of COA?
3. (a) What is the use of binding cache in mobile IP?
(b) What are the limitations of minimal-encapsulation in mobile IP?
4. a) Explain the registration of a mobile node via the foreign and direct registration
with the home agent.
b) What is the purpose of DHCP? Explain client initialization via DHCP.
5. a) Write detailed notes on IP encapsulation mechanisms.
b) What is reverse tunneling? What additional routes do packets take if
reverse tunneling is required?
6. a) Describe data transfer from a mobile node to fixed node and vice-versa.
b) Write short notes on IPv6.
ASSIGNMENT-4
1.
Compare the classical approaches to make the TCP suitable for mobile environment. Give their relative advantages and disadvantages.
2.
Explain in detail Indirect TCP and Snooping TCP.
3 a) Explain the concept of Fast retransmit / Fast recovery in traditional TCP.
b) Explain Transmission/Time-out freezing approach.
4. a) Write a brief notes on congestion control in traditional TCP.
b) Explain Indirect TCP. What are its advantages and disadvantages?
5.a) Write the differences between TCP and UDP.
b) Compare several enhancements to TCP for mobility.

ASSIGNMENT-5
1.
a) Explain in detail the transactional model of database? b) Explain the Query processing of database?
2.
a) Discuss the necessity of cache and briefly discuss about caching invalidation
mechanism.
b) Explain the issues ensuring of QOS in mobile environment
3. a) What are the hoarding techniques? Explain in detail.
b) What is context aware? Explain in detail about context aware computing.
4. a) Explain data cache maintenance in mobile environment.
b) Explain Power – aware computing.
5. a) List and explain the context types in context aware computing.
b) Write about the client server computing with adaptation.
ASSIGNMENT-6
1. a) The push based broad cast are not suitable for large data size, justify.
(b) Explain about on demand data scheduling.
2. a) What is indexing? Discuss the various types of indexing techniques in detail
b) What is balanced push-pull mechanism? In detail explain about IPP.
3. a) Explain Pull based data delivery mechanisms in detail.
b) Explain index and distributed index based selective tuning techniques
4 a) Write brief notes on communication asymmetry with the help of diagrams.
b) Explain interleaved Push – Pull based data delivery mechanism.
ASSIGNMENT-7
1. (a) What is MANET? How is it different from cellular system?
(b) What are the advantages & disadvantages of MANETS?
(c) What are the applications of MANET?
2. a) Explain in detail AODV routing algorithm for MANETS.
b) Explain Dynamic source routing in MANETs.
3. a) Describe security problems in MANETs
b) Explain Destination sequence distance vector routing algorithm in MANETs
ASSIGNMENT-8
1. a) Write notes on the following: (i) WDP (ii) WTLS.
b) What is WAE? Discuss about its logical model.
2. (a) With a neat diagram explain the WAP architecture.
(b) Discuss briefly the user scenarios of Bluetooth.
3. a) Discuss about the wireless transport layer security of security layer.
b) Discuss the configuration and profile of J2ME in detail.
4. a) Explain wireless datagram protocol and Transaction protocol
b) Explain the wireless session protocol of the session layer.
5 a) Define WAP and briefly explain about the features and characteristics of WAP.
b) Discuss about the wireless transaction protocol of the transaction layer.