Mobile technologies:the road to ubiquity

1. Chapter 5:
Infrastructure of
information systems
DANNA FORERO RODRÍGUEZ

2. Evolution of mobile technology

3. Network definitions-1
1G The biggest difference between 1G and 2G is that 1G is analog and 2G is digital; Although the
systems use digital systems to connect the Radiobases to the rest of the telephone system, the
is encrypted when 2G is used
2G Services: Digital Voice, SMS, international roaming, conference, call waiting, call retention, call
transfer, call blocking, call identification number, closed user groups (CUG), USSD services,
authentication, billing based on the services provided to its customers, for example, charges based on
local calls, long distance calls, discounted calls, real-time billing.
CDMA The transceiver base station deciphers them by applying orthogonal code separation methods,
achieving univocal communication with each terminal equipment hooked.
TDMA transmits digital signals that are divided into different time slots instead of in codes.
GSM (Global System Mobile). This structure is applicable for post-paid (contract) and voice-only
subscribers. Later we will be adding more elements so that the network can provide other services
such as SMS or service to prepaid (card) subscribers as well.

4. NETWORKS DEFINITIONS-2
2.5G Intermediate step between 2G and 3G (half obvious)
Contemplate data transmission from 56 kbit / s to 115 kbp / s
Allows WAP browsing, MMS sending and IPV4 services (internet)
Data transmission technology: GPRS
3G In a 3G network it is possible to talk and transmit data simultaneously
Allows internet, mobile TV and video calls
Reaches data transmission speeds up to 2 mb / s
Data transmission technology: W-CDMA
4G Standard not fully standardized (WTF)
Wi-Max and LTE are the protocols that come closest
Compatibility with IPv6
Requires speeds of 100 mb / s in motion of 1 gb / s at rest
"Hand change" (soft handoff) between different antennas
QoS support
Designed for streaming and HD video straming
Low latency, ideal for online games
LTE The modulation chosen by the 3GPP standard makes the different antenna
technologies (MIMO) easier to implement

5. WIRELESS NETWORKS
WI-FI
 It is a technology that allows the wireless interconnection of electronic devices. Wi-
fi-enabled devices (such as personal computers, telephones, televisions, game
consoles, music players ...) can connect to each other or to the internet through a
wireless network access point.

6. WIMAX
 Wimax is a communication technology similar to Wi-Fi but with microwaves with a
range of over 30km and speeds of up to 124Mbps. So far the fastest Wi-Fi networks
are about 54Mbps and with coverage of about 300 meters maximum. It is the firm
technology candidate to offer super fast Internet connections and with very broad
coverage.

7. BLUETOOTH
 Facilitate communications between mobile teams.
 Remove the cables and connectors between them.
 Offer the possibility of creating small wireless networks and facilitate the synchronization of data between
personal computers.

8. SMARTPHONES

9. CHARACTERISTICS
 ESSENTIALS
 powerful processor
 apps
 reliable operating system
 instant messaging
 wifi connection (3G-4G (lte))
 high battery life
 IP voice
 photographic camera
 physical or virtual keyboard
 physical
 PHYSICAL
 screen
 resolution
 physical dimensions
 type of screen and keyboard
 geolocation
 sms
 accelerometers
 IM (instant messaging)
 QR codes
 speech recognition
 NFC

10. TABLETS
It allows:
• reading electronic books
• comics on screen
• consultation and edition
• navigation
• among others...