Question

Q9. Circle the incorrect statement. First generation cellular systems (1G) were
(a) analog (analog modulation)
(b) designed mainly for voice
(c) used FDMA
(d) used TDMA

Q10. In each sub-question, circle the correct word and underline the incorrect one.
In cellular networks as the cell size becomes smaller :
(a) overall system capacity (i.e. total number of active users that can be served over a large coverage area, such as Ottawa and its suburbs) increases / decreases
(b) less / more hando s are needed
(c) more / less accurate placement of basestations is needed
(d) more / less power is transmitted (in both directions)

Q11. In ATM, the service class is suitable for customers who need realtime non-compressed video transmission
(a) CBR
(b) VBR
(c) ABR
(d) UBR

Answer 1

9. option (d) it did not used TDMA.

1G cellular system was used for voice services only

and used FDMA - Frequency Division Multiple Access

and it used analog modulation.

TDMA is used in second generation.

10.

(a) increases, since cells become smaller the users capacity can be increased

(b) more, since we are using smaller cells the more handouts are needed when the user is moving.

(c) more accurate placement of base station is needed since as the cell becomes smaller the base station placement should be in such a way that it should not interfere with other base station's range.

(d) less power is needed since as the cell area is reduced so the transmission power is also reduced.

11. option(a)

Real time non- compressed video transmission uses CBR (Constant Bit Rate)