Mobile Computing3

The immense potential of conventional telephone cannot be exploited to its maximum due to the limitation imposed by the connecting wires. But this restriction has been removed with the advent of the cellular radio. Cellular Concept? 

Cellular concepts. Select the statements below that wrongly describe the term Cellular concept.

1. Used to achieved high capacity.
2. Theoretically drawn in hexagon shapes.
3. total coverage area is subdivided into smaller areas called “cells”
4. Each cell cannot have a base station with a number of RF channels.

The process of using frequency (of frequency pair) more than once in a network is know as ............

1. Frequency modulation
2. Frequency reuse
3. Frequency reallocation
4. Frequency mobility

The process of allowing multiple users to access a radio system is called ..............

1. Multiplexing access
2. Access Multiplexing
3. Multiple Access
4. Modulation access

The area served by a frequency or set of frequencies is known as a .............

1. Footprint
2. Radio site
3. Location
4. Cell

Radio propagation ...............

1. Is a way of describing how the energy in the radio signal travels
2. Describes the medium in which the radio energy is found
3. Gives the radio energy its direction
4. Allows the radio signal to be dissipated (放荡)

A mobile network operator will ..............

1. Use the most appropriate frequencies for the chosen mobile system
2. Have a license to operate within a specific frequency band
3. Share frequencies within a frequency band
4. Always use a single radio channel to provide services

Which of the following is not a recognized radio access scheme?

1. Frequency Division Multiple Access (FDMA)
2. Code Division Multiple Access (CFDMA)
3. Amplitude Division Multiple Access (ADMA)
4. Time Division Multiple Access (TDMA)

GSM uses .............

1. FDMA
2. CDMA and TDMA
3. TDMA
4. FDMA and TDMA

GSM and GPRS .......

1. Share the same core network elements
2. Require different core network elements
3. Are both provided independent of the core network requirements
4. Must both use IP technology

The followings are components required to build the basic mobile cellular network, EXCEPT:-

1. Mobile Switching Centers
2. Base Stations
3. Radio Links
4. Channel Controls Systems

A mobile station consists of two main elements, EXCEPT:-

1. International Roaming Number
2. Mobile Equipment
3. Mobile Handset
4. Subscribers Identity Module

What is system capacity in the context of cellular mobile network?

1. ability to support the least amount of users per cell
2. the max number of users that can be supported at a particular point of time
3. the least amount of channels used for simultaneous call at a particular time
4. Ensure successful handover

What is frequency reuse?

1. Frequency reuse ensures proper distribution of total available frequencies allocated to a network
2. It is a method to used to reduce the demand of scarce frequency resource
3. Use the same frequency in all the cells of the same cellular network
4. One way to increase system capacity

Use the formula to determine the number of cells per cluster, N = i2 + ij + j2, given that i = 2 and j = 3

1. 7
2. 12
3. 19
4. 27

Consider 20 MHz bandwidth is assigned to a cellular network. The system uses two simplex channels of 20 kHz to provide full-duplex voice and control channels. Calculate the number of channels to be assigned per cell for a cluster of size 7.

1. Approximate of 143 channels
2. Approximate of 163 channels
3. Approximate of 153 channels
4. Approximate of 173 channels