1. 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.

2. Where does this topic fit? Internet concepts –Applications –Technology (communication) –Implications Internet skills –Application development –Content creation (images)

3. Cell phone generations 4 0 3 2 1

4. Decade1980s, 1G1990s, 2G2000s, 3G2010s, 4G CoverageOutdoorIn/outdoorGlobal roaming ApplicationsBusiness voice Consumer voice Voice and some data Voice is one type of data Data speed9.6-28kbpsUp to 100 kbps Up to 2 mbps, slower in a car Up to 100 mbps StatusObsoleteDeployedDeploying now LTE, WiMax beginning Connection mode Circuit Packet -- always on Cell phone improvement

5. Actual connection speed varies

6. What slows the connection? Distance Congestion

7. Coverage varies

8. Coverage improves with further investment AT&T wireless coverage More on coverage and speed variability

9. Cell phone Micro cell Home access point Internet Gateway Cell network Femtocells for “five bars” at home

10. Cell towers

11. Map generated by MobilediaMobiledia Cellular towers near CSUDH

12. 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.