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Code No. L0423 R07 Set No.1
1 of 1
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IV B.Tech II Semester Regular Examinations, April, 2011
WIRELESS COMMUNICATIONS AND NETWORKS
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time: 3 hours Max. Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*****
1. a) Explain CDMA, mentioning the salient features of this spread spectrum
multiple Access technique. [8]
b) Determine the maximum through put that can be achieved using slotted
ALOHA protocol. [8]
2. a) Explain about local land line telephone network with a neat diagram. [8]
b) Discuss the second generation wireless networks . [8]
3. a) Discuss the channel characteristics of ARDIS wireless data service. [8]
b) Draw the common channel signaling (CCS) network and explain its
functioning. [8]
4. a) Draw the wireless Application protocol (WAP) infrastructure and explain
its working [8]
b) Write short notes on ‘wireless datagram protocol” [8]
5. a) Discuss the WLAN applications and its requirements. [8]
b) Discuss the Medium Access control in IEEE 802.11 with a neat protocol
architecture. [8]
6. a) Discuss the various usage models of Blue tooth with neat block schematics. [8]
b) Explain the 3 error correction schemes that are used in Blue tooth. [8]
7. Write short notes on the following. [2X8]
a) Data oriented CDPD network.
b) Hand off Management in GPRS.
8. a) Discuss the Protocol entities in wireless ATM that support wireless mobility [8]
b) Write short notes on ‘IEEE802.15 WPAN”. [8]


Code No. L0423 Set No.2 R07
1 of 1
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JNTUWORLD

IV B.Tech II Semester Regular Examinations, April, 2011
WIRELESS COMMUNICATIONS AND NETWORKS
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time: 3 hours Max. Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*****
1. a) Explain FDMA with a neat diagram bringing out its salient features. [8]
b) What is packet Radio? Explain the pure ALOHA protocol in detail. [8]
2. a) Distinguish between wireless and fixed telephone networks. [8]
b) Discuss traffic routing in wireless networks. [8]
3. a) Draw the CDPD network and explain its working. [8]
b) Write shot notes on ‘ISDN’. [8]
4. a) Discuss the Tunneling in Mobile IP. [8]
b) Discuss the important capabilities of WML scripts. [8]
5. a) What is WLAN? Discuss the transmission techniques that are employed in
infrared LAN. [8]
b) Discuss the services of IEEE 802. [8]
6. a) Discuss the Baseband and Radio specifications of BLUE TOOTH. [8]
b) Explain the logical link control of BLUE TOOTH. [8]
7. a) What is GPRS? With a neat architecture, explain the mobility issues
in GPRS [8]
b) Disuses the SMS in GSM. [8]
8. a) Draw the basic architectural diagram of WATM and explain its
working. [8]
b) Write Short notes on “Adhoc Architecture in HiperLAN 1”. [8]


Code No. L0423 R07 Set No.3
1 of 1
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JNTUWORLD
IV B.Tech II Semester Regular Examinations, April, 2011
WIRELESS COMMUNICATIONS AND NETWORKS
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time: 3 hours Max. Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*****
1. a) What is TDMA? Derive the spectral efficiency for a narrow band
TDMA system. [8]
b) Discuss various CSMA protocols. [8]
2. a) Discuss the limitations of wireless networking. [8]
b) Distinguish between circuit switching and packet switching. [8]
3. a) Discuss the Link layer characteristics of CDPD with a block
schematic. [8]
b) With a neat protocol architecture, explain the Network services part
of SS7. [8]
4. a) Explain the operation of mobile IP with a neat diagram mentioning
its basis capabilities. [8]
b) Discuss the WSP services and its capabilities. [8]
5. a) Write short notes on “Infrared LANs”. [8]
b) Discuss the MAC frame format of IEEE 802 protocol. [8]
6. a) Draw the Bluetooth protocol stack schematic and explain the function
of each unit. [10]
b) Discuss L2CAP formats of Bluetooth. [6]
7. a) What is GPRS? Explain its working with neat system architecture. [8]
b) Write shot notes on ‘SMS in GSM”. [8]
8. Write short notes on [8+8]
a) Wireless ATM
b) Home RF system.

Code No. L0423 R07 Set No.4
1 of 1
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www.jntuworld.com
JNTUWORLD
IV B.Tech II Semester Regular Examinations, April, 2011
WIRELESS COMMUNICATIONS AND NETWORKS
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time : 3 hours Max. Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*****
1. a) Distinguish between CDMA and SDMA. [8]
b) Determine the maximum through put that can be achieved using pure
ALOHA protocol [8]
2. a) Mention 2nd Generation (2G) Networks standards. [6]
b) Discuss the limitations of wireless Networks in brief. [4]
c) Discuss X.25 protocol for packet switching. [6]
3. a) Explain CDPD with a neat block schematic. [8]
b) Draw the block diagram of ISDN and explain two interfaces used in this
network. [8]
4. a) Explain the Registration and Tunneling capabilities of Mobile IP. [10]
b) Mention important features and capabilities of WML script. [6]
5. a) Draw the IEEE 802 protocol architecture and list out the services provided
by IEEE 802. [8]
b) Discuss the application areas of wireless LAN’s and list out the advantages
of Infrared LAN. [8]
6. a) Discuss the Radio specification of Bluetooth. [8]
b) Discuss the Adaptation control of Bluetooth. [8]
7. a) Explain how the mobility support is achieved in GPRS with a neat reference
architecture. [8]
b) Write shot notes on wireless Application protocol “WAP” [8]
8. a) What is wireless ATM? Explain the working of WATM with a neat reference
model. [8]
b) What is HiperLAN? Mention the functional requirement for HiperLAN. [8]