Chapter 1 - Mobile Systems Part 1

What is Portability?

• Changing point of attachment to network online

• Changing point of attachment to power offline

• Changing point of attachment to network offline

• Changing point of attachment to power online

Radio channel used for transmission of information from base station to the mobile.

• Control channel

• Forward channel

• Reverse channel

• Mobile channel

what is Frequency reuse?

• Multiple users using the same frequency at the same time for communication

• Each cellular base station is allocated a group of radio channels within a small geographic area

• Grouped cells

• Communication systems which provide only one way communication

what is/are the source of interference?

• Another mobile in the same cell

• Non-cellular systems leaks energy into the cellular frequency band

• A call in-progress in the neighboring cell

• All of the above

How many frequency reuse factor on this pattern?

• 1

• 4

• 7

• 12

Grade of Service (GOS) is_____________________________.

• Each user is allocated a channel on a per-call basis; and upon termination of the call

• One erlangs represent the amount of traffic density by a channel that is completely occupied

• Technique for decreasing co-channel interference by using directional antennas

• Measure of ability of the user to access a trunked system during the busiest hour during a week, month or year

The diagram above represent?

• Cell splitting

• Cell sectoring

• Cell selecting

• Cell spacing

Why neighbouring stations are assigned different group of channels in cellular system?

• To minimize interference

• To minimize area

• To minimize throughput

• To minimize capacity of each cell

The choice of channel assignment strategy does not impact the performance of the system. State whether True or False.

• True

• False

Which of the following is a universally adopted shape of cell?

• Square

• Circle

• Hexagonal

• Triangle