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PROGRAM
MCA(REVISED FALL 2012)
SEMESTER
V
SUBJECT CODE & NAME
MCA5032- WIRELESS AND MOBILE COMMUNICATION
1 Describe Wireless Communication. Explain its advantages
Answer: Wireless communication is among technology’s biggest contributions to
mankind. Wireless communication involves the transmission of information over a
distance without help of wires, cables or any other forms of electrical
conductors. The transmitted distance can be anywhere between a few meters (for
example, a television’s remote control) and
2 Describe any five GSM PLMN basic services.
Answer: 5 GSM PLMN basic services
Dual-Tone multifrequency (DTMF): The automatic answering machines used in wireless telephone network
needs a controlling mechanism. For this purpose the GSM PLMN uses a tone
3 Explain the use of control channels in GSM network.
Answer: The channels may also be divided into common and dedicated channels.
The forward common channels are used for paging to inform a mobile of an
incoming call, responding to channel requests, and broadcasting bulletin board
information. The return common channel is a random access channel used by the
mobile to request channel resources
4 What is CDMA? Explain the history of CDMA.
Answer: CDMA stands for Code Division Multiple Access and in the cellular
world, CDMA technology was originally known as IS-95. Basically CDMA is a "spread
spectrum" technology that has been used in digital cellular radio communications
and advanced wireless technologies, and allows many users to occupy the same
time and frequency allocations in a given
5 Identify detailed implementation about A5 algorithm?
Answer: A5 Algorithm – An A5 encryption algorithm scrambles the user's voice and data traffic
between the handset and the base station to provide privacy. An A5 algorithm is
implemented in both the handset and the base station subsystem (BSS). This
algorithm is used to encipher and decipher the data that is being transmitted
on the Um interface. The Kc (
6 List and explain the different path loss models.
Answer: Path Loss Models
Path loss models describe the signal attenuation between a transmit and
a receive antenna as a function of the propagation distance and other parameters.
Some models include many details of the topography profile to estimate the
signal reduction, whereas others just
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