BNT501 – Wireless and mobile Communication

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Assignment

DRIVE	FALL 2014
PROGRAM	BSC(NT)
SEMESTER	V
SEMESTER CODE & NAME	BNT501 – Wireless and mobile Communication
BK ID	B1485
CREDIT	4
MARKS	60

1 What is First generation? Explain Features, Advantages and Disadvantages of 1G network.

Answer: First generation:

v  First generation immigrant, a citizen or resident who is an immigrant or has immigrant parents

v  First-generation antihistamine, the oldest H1-antihistaminergic drugs

v  First-generation programming language, any of a class of machine-level programming languages

v  1G, the first-generation of

2 Briefly discuss the various logical channels of GMS network.

Answer: Logical channels of GMS network: GSM uses a variety of channels in which the data is carried. In GSM, these channels are separated into physical channels and logical channels. The Physical channels are determined by the timeslot, whereas the logical channels are determined by the information carried within the physical channel. It can be further summarised by saying that several recurring timeslots on a carrier constitute a physical channel. These are then used by different logical channels to transfer information. These channels may either

3 Explain Mobility Management in Wireless Network

Answer: Mobility Management in Wireless Network: Wireless mobility management: in Personal Communications Service (PCS), the assigning and controlling of wireless links for terminal network connections. Wireless mobility management provides an "alerting" function for call completion to a wireless terminal, monitors wireless link performance to determine when an automatic link transfer is required, and coordinates link transfers between

4 Explain Forward Logical Channels

Answer: Forward Logical Channels: There are many UMTS channels that are used within the UMTS system. The data carried by the UMTS / WCDMA transmissions is organised into frames, slots and channels. In this way all the payload data as well as the control and status data can be carried in an efficient manner.

UMTS uses CDMA techniques (as WCDMA) as

5 Explain any two Diversity techniques

Answer: Techniques applied to combine the multiple received signals of a diversity reception device into a single improved signal.

Diversity techniques:

Time Diversity (1)

v  Transmission in which signals representing the same information are sent over the same channel at different times

6 Explain any five Wireless LAN Requirements.

Answer: Wireless LAN: A wireless local area network (WLAN) is a wireless computer network that links two or more devices using a wireless distribution method (often spread-spectrum or OFDM radio) within a limited area such as a home, school, computer laboratory, or office building. This gives users the ability to move around within a local coverage area and still be connected to the network, and can provide a connection to the wider Internet. Most

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