Presentation: cellular connectivity

bottlelewdΚινητά – Ασύρματες Τεχνολογίες

12 Δεκ 2013 (πριν από 3 χρόνια και 6 μήνες)

54 εμφανίσεις

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

4

0

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, WiMax

beginning

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

Home

access

point

Internet

Gateway

Cell

network

Femtocells for “five bars” at home

Cell

towers

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.