Rajiv Gandhi Proudyogiki Vishwavidyalaya 2008-4th Sem M.C.A Computer Aplications .(ester) , e, - Question Paper

MCA-402(N)
M.C.A.(Fourth Semester) EXAMINATION,June,2008
(New Course)
MOBILE COMMUNICATION
[MCA-402(N)]
Time : 3 Hours
Maxmimum Marks : 100
Minimum Marks : 40

Note : Attempt all the 5 ques. selecting 1 ques. from every Unit.

Unit - I
1.(a) Compare different multiple access techniques.
(b) discuss the relationship ranging from OSI model and wireless communications.

Or

(a) discuss the difference ranging from various modulation techniques.
(b) describe the subsequent :
(i) Frequency modulation
(ii) Frequency derivation
(iii)Modulation index for frequency modulation

Unit - II

2. (a) elaborate various physical factors affecting small scale fading ?
(b) discuss about slow and fast fading.

Or

(a) How can youincrease the capacity of cellular system with the help of frequency reuse
concepts ?
(b) provided a cellular system in which there are a total of 1001 radio channels available for
handling traffic. It is also provided that the area of a cell is six km2 and the area of the
entire system is 21oo km2 :
(i) compute the system capacity if the cluster size is 7.
(ii) How many times would the cluster of size four have to be replicated in order to
approximately cover the entire cellular area ?

Unit - III

3.(a) discuss the architecture of GSM.
(b) discuss the GSM protocol architecture.

Or

(a) discuss about the protocol layers in GPRS.
(b) discuss short messaging services in GPRS.

Unit - IV
4.(a) discuss the prtocol layers wireless application protocol(WAP).
(b) discuss the WAP programming architecture.

Or

(a) define reference architecture of IEEE 802.11.
(b) discuss the subsequent :
(i) FHSS
(ii) DSSS
(iii) DFIR
(iv) MAC sublayer

Unit - V
5. What is bluetooth ? Why is the technology called bluetooth? How is bluetooth used ? Will
bluetooth and wireless LAN interface with every other ? What is the data throughput speed of a
bluetooth connection ? What is the range of bluetooth transmitter/receivers ? will other radio
frequency devices interface with bluetooth devices ? what type of encryption is used for
bluetooth security ?
Or
What is VSAT system ? elaborate difference VSAT topologies and access schemes ? discuss.

Earning:   Approval pending.