1.4 Cellular Standards

Question 1

2G

Answer 1

o Handle phone calls / SMS [text] & sending out limited amounts of data

Question 2

GSM

Answer 2

Global System for Mobile Communications
- Used by AT&T / T-Mobile

Question 3

CDMA

Answer 3

Code-Division Multiple Access
 Used by Sprint & Verizon
 Uses PRL = Preferred Roaming List [have to update]
* Indicates which radio bands, sub-bands, & service providers IDs will be searched for
* Then allows phone to connect to correct tower

Question 4

GSM & CDMA

Answer 4

NOT compatible with each other
o GSM: popular about 99% [can go outside US]
o CDMA: CAN’T GO outside US
 Have to update phone

Question 5

3G

Answer 5

o Allows additional features such as mobile internet access, video calls, & mobile TV

Question 6

4G

Answer 6

o WiMAX & Long-Term Evolution [LTE]
o Were 2 standards, LTE won
o Faster than 3G
 Theoretical max is 300 Mbps down, 75 Mbps up
o NO need for GSM or CDMA
o ONE standard

Question 7

5G

Answer 7

o Much faster than 4G
 Up to 100x faster
o May hit speeds of 200 Gbps
o Used to stream large amounts of data such as digital video & movies
o LOW latency links
 How long data takes to get to you

Question 8

Low Latency Important for

Answer 8

medical devices, autonomous cars,
o send / receive information very fast