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PROGRAM
BSc
IT
SEMESTER
FIFTH
SUBJECT
CODE & NAME
BT0086,
Mobile Computing
Qus:1
Write short notes on:
(a) Frequency modulation (FM)
(b) Phase modulation (PM).
Ans:
(a)
Frequency modulation (FM):
In frequency
modulation, the message signal m(t), varies the frequency of a carrier wave.
The basic principle behind FM is that the amplitude of an analog baseband
signal can be represented by a slightly different
Qus:2
What is near and far effect problem in wireless communication? Explain in
brief.
Ans:
The
near and far effect problem in wireless communication:
Near and far terminals
in the wireless networks suffer from the problem of near/far effect due to
different level of signal power received by them. As shown in figure below ,
terminal A and B both transmit the signal with the same transmission power.
Since the signal strength decreases proportionally to
Qus:3
Explain about the Operation Sub System (OSS) of GSM system.
Ans:
The
Operation Sub System (OSS) of GSM system:
The operation
subsystem (OSS) contains the necessary functions for network operation and
maintenance. The OSS possesses network entities of its own and accesses other
entities via SS7 signaling. OSS
Qus:4
Explain Hard handover and Soft handover in UMTS.
Ans:
Hard
handover and Soft handover in UMTS:
Hard
handover: When the User Equipment (UE) switches between
different antenna and different systems then there the carrier frequency used
for communication also changes. When the carrier frequency changes for
communication, we say this type of handover as hard handover. This type of
handover is
Qus:5
List the advantages and disadvantages of Infra-red technology.
Ans:
The
advantages and Disadvantages of Infra-red technology:
Advantages of Infra-red technology:
Advantages of
Infra-red technology are:
·
It’s
simple.
·
No
licenses are needed for infra-red technology
·
Version
1.0 of this
Qus:6
Write short notes on:
(a) HiCoMo: High Commit Mobile
Transaction Model
(b) Kangaroo mobile transaction
model
Ans:
(a)
HiCoMo: High Commit Mobile Transaction Model:
HiCoMo is a mobile
transaction execution model and mainly processes aggregate data stored in a
data warehouse in the mobile units. Since the data warehouse resides in mobile
units, HiCoMo transactions are always initiated on mobile units where they are
processed in a disconnected mode. As a result,
Get fully solved assignment. Buy online from website
online store
or
plz drop a mail with your sub code
we will revert you within 2-3 hour or immediate
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125/subject and rs 625/semester only.
if urgent then call us on 08791490301, 08273413412
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