M.Sc. (Semester IV) (CBCS) Examination Oct/Nov-2017
Electronics Science
MOBILE COMMUNICATION
Day Date: Monday, 20-11-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions: Q. and are compulsory.
Answer any three questions from Q.3 to Q.7.
All questions carry equal marks.
Use of nonprogrammable calculator is allowed.
Q.1 Choose the alternatives given below. 08
A can only display short text message and cannot send any
message.
Mobile phones Pocket computer
Laptop Pager
If the corresponding value of are then frequency reuse factor N is

0 3
9 7
A establishes a virtual pipe for data packets between an inner
entry and an inner exit points.
Tunnel Header
Data Original IP
protocol is used between the access point and the switch.
APC IP
TCP B-ISDN
The behavior TCP shows after the detection of congestion is called

Fast retransmit Slow start
Fast recovery Implications of mobility
Medium access control belongs to
Physical layer Network layer
Data link layer Transport layer
The type of access used in GSM technology is
OFDMA CDMA
FDMA/TDMA TDMA
The antenna which attempts to direct all its energy in a particular direction is
called as
Directional antenna Dish antenna
Horn antenna Parabolic antenna
Page 2 of 2
SLR-MH-344
State True or false. 06
The FDMA multiple access is achieved by allocating different time slots for
the different users.
A piconet network can have upto 9 stations.
The remote and rarely populated areas will be covered by macro cells.
WATM is a third generation mobile communication technology.
Infrared technology uses diffused light reflected at walls, furniture, etc.
In mobile IP, the problem of changing the IP address while still having a
TCP connection open means connection will breaks.
Q.2 Attempt the following.
Explain the advantages and disadvantages of Infrared technology in
wireless transmission.
05
Explain in brief mobile and wireless devices. 05
Write a note on WATM mobile quality of services. 04
OR
What is your idea of Snooping TCP? 04
Q.3 Draw and explain the system architecture of IEEE 802.11 standard. 08
Draw and explain the format of an IEEE 802.11 physical frame using FHSS. 06
Q.4 Explain the function architecture of GSM system with a suitable sketch. 08
Write a note on Bluetooth. 06
Q.5 Explain the several terms needed to understand the mobile IP? Explain its
registration mechanism.
10
Differentiate TDMA from that of the CDMA. 04
Q.6 Explain the following referred to the cellular communication. 08
Frequency reuse
Hand off
What is GSM? List the services of GSM. 06
Q.7 Explain in brief packet switched data services on cellular networks. 08
Explain about Hiper LAN with reference model. 06