M.Sc. (Electronics Science) (Semester IV) (CBCS) Examination,
2017
MOBILE COMMUNICATION
iI
Day Date: Friday, 21-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
N.B. Question number 2 and 6 are compulsory.
Attempt any three from questions number 3 to 7.
All questions carry equal marks.
Use of nonprogrammable calculator is allowed.
Q.1 Select the correct alternatives. 08
1g) The access point in the wireless is equivalent to
a wired LAN.
Switch Repeater Hub Gateway
2 is used for error detection.
CRC Hamming Huffman Convolution
3 Maximum synchronization channels on a forward CDMA link are

0 1 7 8
4 The mechanism used in Indirect-TCP is
Split TCP connection into two
Split TCP connections, choke sender
Snoop data
Snoops data and acknowledgement
a mechanism as taking a packet consisting of packet
header and data pushing it into the data part of a new packet.
Decapsulation Encapsulation
Synchronous Asynchronous
6 Which among the following is a license free band?
ISM GSM CDMA AMPS
If two or more stations access the medium at the
occurs.
Same time Different time
Any time Both b and c
What is CDMA digital cellular standard?
IS-95 IS-96 IS-59 Both a and c
Page 2 of 2
State true or false. 06
DHCP is based on client-server model.
In CDMA, channel is orthogonal code.
A Bluetooth operates at 2 GHz band.
TDMA is an example of continuous transmission scheme.
Encapsulation is the mechanism of taking packet and putting it
into the data part of a new packet.
The main advantage of infra red technology is wider bandwidth.
Q.2 Attempt the following. (any 14
Explain the need and applications of wireless communication. 05
Explain the infrastructure network with suitable diagram. 05
Mention the advantage of WLAN. 04
What is selective retransmission and recovery? 04
Q.3 Explain cellular system operation and planning in detail. 08
Briefly explain multiple access technologies or cellular systems. 06
Q.4 Explain IS-95 CDMA network with its forward and reverse channel
mechanisms.
10
Explain WATM services. 04
Q.5 Describe Traditional TCP in detail and point out its different
mechanism.
10
Explain handover of WATM. 04
Q.6 Explain IP packet delivery mechanism in model IP. 08
Explain in brief DHCP. 06
Q.7 Explain format of an IEEE 802.11 physical frame using DSSS and
FHSS techniques.
10
Explain bluetooth referred to its advantages and disadvantages. 04