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All Q&A
1

What is hand-off? What are the different hand-off strategies? Discuss the merits and demerits of each such strategy?

 21 January, 2025
A handoff refers to the process of transferring an active call or data session from one cell in a cellular network to another or from one channel in a cell to another.
2

What are hidden station problem and exposed station problem in WLAN? How are the problems solved?

 21 January, 2025
B is sending data to A, and after some time C also wants to send data to B. but C is not in the range of B and so it will be unaware of the transmission between B and A,
3

What is WAP? Why it is used?

 21 January, 2025
Wireless Application Protocol (WAP) is a technical standard for accessing information over a mobile wireless network.
4

What is multiple access technique? Do a comparative study among FDMA,TDMA and CDMA.

 21 January, 2025
Multiple Access Techniques are techniques to access a single channel by multiple users. They provide multiple access to the channel. A “channel” refers to a system resource allocated to a given mobile user enabling the user to establish communication with the network (other users).
5

Write short note on 

  • Wireless local loop

  • Iridium satellite system

21 January, 2025
Wireless local loop (WLL), is the use of a wireless communications link as the "last mile / first mile" connection for delivering plain old telephone service (POTS) or Internet access (marketed under the term "broadband") to telecommunications customers.
6

Define WLAN. Illustrate the system architecture of IEEE802.11 WLAN. Explain with diagram the protocol architectures and manage of IEEE 802.11.

 21 January, 2025
WLAN (wireless local area network) is a local area network without wires. Mobile users can access information and network resources through WLAN as they are moving from one place to another. It is implemented as an extension of wired LAN within a building or campus.
7

Define the following terms and state their usage.

  • Near-far effect
  • Orthogonal code and its usage in mobile communication  
  • FCC
  • RVC
  • TMSI
 21 January, 2025
The near-far problem is a condition in which a receiver captures a strong signal and thereby makes it impossible for the receiver to detect a weaker signal.
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