Week 3

Question 1

Basic Cellular Network Architecture?

Answer 1

Physical

Logical

Question 2

Frequency Allocations?

Answer 2

3 kHz to 300 GHz

Question 3

Frequency Reuse in Cellular Topology?

Answer 3

Frequency Reuse to attain optimum capacity

Question 4

Frequency Reuse?

Answer 4

Radio signal attenuates with distance

Question 5

Effect of Reduced Cell Size?

Answer 5

The number of cells becomes higher -> capacity increases.

Question 6

Interference and System Capacity?

Answer 6

Cellular Systems are interference limited.

Co-Channel Interference.

Question 7

2 Factors for a data network performance?

Answer 7

Throughput

Delay

Question 8

ACI?

Answer 8

Adjacent Channel Interface

Question 9

Adjacent Channel Interface

Answer 9

Interference resulting from signals which are adjacent in frequency to the desired signal is termed as the adjacent channel interface.

Question 10

GOS?

Answer 10

Grade of Service

Question 11

QOS?

Answer 11

Circuit switched cellular networks employ trunking to accommodate a large number of users in a limited radio spectrum.

Question 12

Traffic Intensity?

Answer 12

Measure of channel time utilization

Question 13

One Erlang?

Answer 13

The amount of traffic carried by a channel that is completely occupied

Question 14

Blocked Call?

Answer 14

Call which can not be completed at a time of request due to congestion

Question 15

Load?

Answer 15

Traffic intensity across the entire trunked radio system

Question 16

Request Rate?

Answer 16

The average number of call request per unit time

Question 17

Cell Sizes?

Answer 17

Macro Cell
Micro Cell
Pico Cell
Femto Cell (LTE)

Question 18

Decreasing Cell size gives?

Answer 18

Increased user capacity
Increased number of handovers per call
Increased complexity in locating the subscriber