Cellular connectivity

Skills: none

IT concepts: cellular generations and their characteristics, speed and coverage variation

This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.

Where does this topic fit?

• Internet concepts– Applications– Technology (communication)– Implications

• Internet skills– Application development– Content creation (images)

Cell phone generations

40

3

2

1

Cell phone generations

Decade 1980s, 1G 1990s, 2G 2000s, 3G 2010s, 4G

Coverage Outdoor In/outdoor Global roaming

Global roaming

Applications Business voice

Consumer voice

Voice and some data

Voice is one type of data

Data speed 9.6-28kbps Up to 100 kbps

Up to 2 mbps, slower in a car

Up to 100 mbps

Status Obsolete Deployed Deploying now LTE, WiMaxbeginning

Connection mode

Circuit Circuit Packet -- always on

Packet -- always on

Cell phone improvement

Actual connection speed varies

What slows the connection?

Distance Congestion

Coverage varies

Coverage improves with further investment

AT&T wireless coverage More on coverage and speed variability

Cell phone

Micro cell

Homeaccesspoint

Internet

Gateway

Cellnetwork

Femtocells for “five bars” at home

Celltowers

Map generated by Mobiledia

Cellular towers near CSUDH

Cellular connectivity

Skills: none

IT concepts: cellular generations and their characteristics, speed and coverage variation

This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.