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
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
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 Home access point Internet Gateway Cell network Femtocells for “five bars” at home
Cell towers
Map generated by MobilediaMobiledia 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.