Wireless Network(8th Semester B.Tech Kerala University Questions

Module-I(4 marks)

1. Write differences between wired fixed and wireless methods?
2. Why base band signals cannot be directly transmitted in a wireless systems?
3. Explain the principle of packet switching?
4. List the security services offered by GSM?
5. Explain Space Division Multiplexing and Frequency Division Multiplexing?
6. Draw TCP/IP protocol stack and mention functions of each layer?
7. What is the channel capacity for a teleprinter channel with 300 Hz bandwidth and a signal to noise ratio of 3dB,where the noise is white thermal noise?
8. Is a directional antenna useful for mobile phone?Why?how can the gain of an antenna can be improved?
9. How is channel capacity related to Bandwidth in noise free as well as noisy transmission channels?
10. List the differences in media characteristics for wireless systems when compared to wired systems?
11. What are the various types of antennas used for free space propagation in wireless networks?

 Module-II(4 marks)

1. Explain the features of CDMA?
2. Compare mobile IP and ICMP?
3. Draw the topology of wireless LAN stressing the  communication aspects?
4. Explain cyclic redundancy code.What are the different criteria to chose a generator polynomial?
5. Explain TDMA?
6. Write short notes on infrastructural and adhoc networks?     
7. State the principle used in direct sequence spread spectrum?
8. Draw the block diagram of a satellite based global communication system reading stating the frequencies used?
9. What is meant by frequency reuse distance in cellular networks?How is it calculated?
10. Draw the WAP architecture and state its salient features?

Module-III(4 marks)

1. What is IEEE 802.11 system architecture?
2. Discuss  the stages and states of Bluetooth device?
3. What is an adhoc network?
4. Name reasons for the development of wireless ATM.Why did WATM not succeed as stand alone technology?What part of WATM succeeded?
5. Write short notes on IMEI,MSISDN and TMSI?
6. How IEEE 802.11 and bluetooth respectively,solve the hidden terminal problem?
7. State the challenges in the design of an adhoc networks when compared to an infrastructure based network?
8. What are the transmission and modulation schemes used in infrared LANs?
9. State the potential applications of wireless ATM standard.Is it related to IEEE 802.11 standard?

 Module-I(20 marks)

1.  Briefly explain the history   of evolution of wireless communication systems?
2.  Explain architecture of GSM which will segment speech processing and frame transmission?
3. Explain in detail the TCP/IP and the mode interation architecture? 
4. Describe the congestion control,slow,start and fast retransmit and fast recovery?
5. Explain different in-guided transmission  media?
6. Describe the methods of calculating channel capacity of noiseless and noisy channels.Give examples for each?
7. Explain different mobile services provided by GSM system?
8. Explain the functions of Networks layer in ISO/OSI reference model?

Module-II(20 marks)

1. What is spread spectrum and explain any one application in communication field?
2. Explain various error detection and correction methods?
3. What are cellular wireless networks?Explain the principle?
4. Explain the working of  CDMA and how it is different from TDMA?
5. Explain different wireless propagation modes?
6. Explain Frequency hopping spread spectrum.Give example?
7. Explain CDMA?
8. Explain Mobile IP?
9. State the key principle used in spread spectrum communications.Why is it more immune to noise compared to noise compared to other schemes?
10. What are the arious sub systems functioning within a satellite in a satellite communication system.List the specific features of a Geostationary satellite communication system?
11. Draw and explain the protocol stack in a wireless applications enviornment?
12. Describe how Wireless Transport Layer Security(WTLS) can be used in establishing a secure session?

Module-III(20 marks)

1. What are wireless LAN standards?Explain the IEEE 802 architecture and services?
2. Explain MAC management of wireless ATM.How do synchronisation,power management and Roaming achieved in this strategy?
3. Draw and explain IEEE 802.11 protocol architecture?
4. Draw IEEE 802.11 MAC packet structure?
5. What is piconet?Explain a typical configuration of Bluetooth based piconet?
6. Explain LMP and L2CAP with neat diagrams?
7. Draw the system architecture of a typical infrastructure based wireless LAN and state the functioning of each subsystem block?
8. Can a wireless LAN be interfaced to a wired LAN?Explain with appropriate protocol diagram?
9. Explain the IEEE 802.11 system and protocol architecture?
10. Describe the basic functions of the MAC layer.Also state what additional additional management functions are taken care of by the MAC layer?