WIRELESS NETWORKED DIGITAL DEVICES BY SAIKIRAN PANJALA

1. WIRELESS
NETWORKED
DIGITAL DEVICES
Presenting by
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Guide
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2.  Wireless networks: A wireless network is any type
of computer network that uses wireless data
connection for connecting network
 Digital device: A device that represents
information using the convention building on the
binary digits 0 or 1.

3. The Wireless Revolution
• Mobile phones have become mobile platforms for
delivering digital data, used for recording and
downloading photos, video and music, Internet
access, and transmitting payments.
• An array of technologies provides high-speed wireless
access to the Internet for PCs and other wireless
handheld devices and cell phones.
• Businesses increasingly use wireless to cut costs,
increase flexibility, and create new products and
services.

4. Wireless Transmission Media and Devices
• Microwave systems transmit high-frequency radio
signals through the atmosphere.
• Communication satellites are used for
geographically dispersed organizations

5. Devices for Wireless Transmission
• Cellular telephones
• Personal Digital Assistants (PDAs)
• Smart phones

6. Advantages
 It is convenient to use
 This wireless network can serve increased
number of clients with existing equipment
 Cost is less than wired network

7. Cellular Network Standards and Generations
Standards:
• Global System for Mobile Communication (GSM)
• Code Division Multiple Access (CDMA)

8. STANDARDS
 GSM: Developed to provide common 2nd-
generation technology for Europe.200 million
customers worldwide, almost 5 million in the
North America
 CDMA: It is a channel access method used by
various radio communication technologies

9. Cellular Generations
• 1G: Analog cellular networks for voice
communication
• 2G: Digital wireless networks, primarily for voice
communication; limited data transmission
capability

10. Cellular Generations: (Continued)
 2.5G: This is between 2nd and 3rd generations and it
is associated with General packet radio
services(GPRS)
• 3G: High-speed; mobile; supports video; always-
on transmission for e-mail, Web browsing, instant
messaging

11. Mobile Wireless Standards for Web Access
• Wireless Application Protocol (WAP): Uses
Wireless Markup Language (WML) and micro
browsers
• I-mode: Uses compact HTML and allows for
continuous connection

12. Wireless Application Protocol (WAP) versus I-mode
Figure 7-15

13. The Institute of Electrical and Electronics Engineers (IEEE)
established global wireless network standards
Global Wireless Network Standards:
• IEEE 802.15 (Bluetooth) for the Personal Area
Network (PAN)
• IEEE 802.11 (Wi-Fi) for the Local Area Network
(LAN)

14. A Bluetooth Network (PAN)

15. Bluetooth:
 It is a wireless technology standard for
exchanging data.
 It Can link up to 8 devices in 10-m area
 Low power is required for data transmision

16. Wi-Fi
 Infrastructure mode: Devices use access point to
communicate with wired network
• Ad-hoc mode (peer-to-peer): Wireless devices
communicate directly with each other

17. Radio Frequency Identification (RFID)
 Radio Frequency Identification (RFID) systems:
Provide a powerful technology for tracking the
movement of goods throughout the supply chain

18. How RFID Works

19. Conclusion
 Wireless networks having low cost compared to
the wired network.
 High flexibility.