this paper shows an overview of wireless network such as Wi-Fi, Bluetooth and ZigBee

1. OVERVIEW OF WIRELESS
NETWORK
By Touko Borel

2. Introduction
• The first professional wireless network was
developed in 1969 and became operational in June
1971 which was WaveLAN developed by NCR in
1986.
• A wireless network is a computer that uses wireless
data connections between network modes.
• There are basically four different types of wireless
network: WAN, MAN, LAN and PAN.

3. 1. Bluetooth
• It is a specification of IEEE with a standard IEEE
802.15.1
• It is used to exchange data between fixe or mobile
devices over a short distance using frequency from
2.4 GHz to 2.485 GHz
• It is known as a Personal Area Network (PAN)
• Its range is comprised between 0 to 100 m.
• the transmitter device can change frequencies 1600
times every second known as frequency hopping.

4. Advantages of Bluetooth
• The power consumption of the chip is low and
almost 0.3mW
• Multimedia transfer: you can exchange data like
songs, videos, images, documents etc.
• Ultimate headset: to allow one of headset to be
used with a device like telephones, stereos, etc.
• Automation synchronization: devices can connect
on the behalf of the user without user intervention.

5. Some Bluetooth devices

6. 2. WIFI
• WIFI means Wireless Fidelity that refers to the IEEE
802.11 standard for Wireless Local Network (WLAN)
• It is a technology that used radio waves to provide
network connectivity. The established connection
uses an adapter to create hotspots
• It allows devices to be connected to each other into a
LAN and to the internet without using a cable or a
wire.
• It works on physical and data link layers

7. Types of versions of WIFI
There are different versions of WIFI which are:
 802.11a: developed in 2001 which transmits at 5
GHz, can reach 54 MBps within 15 m range, the less
popular
 802.11b: developed in 2000 which transmits at 2.4
GHz, can reach 11 MBps within 30 m range, the most
popular
 802.11g: developed in 2003 which transmits at 2.4
GHz, can reach 30 m range.
 802.11ac: the recent one which transmits at both the
frequencies 2.4 GHz and 5 GHz

8. Advantages of WIFI
• Mobility
• Cost
• Reliability
• Security
• Speed
• Easy to install
• roaming

9. Example of WIFI connectivity

10. 3. ZigBee
• ZigBee is a wireless technology developed in need of
low cost, low power consumption and developed in
2003 by ZigBee Alliance.
• The standard of ZigBee is IEEE 802.15.4 which
operates in unlicensed bands as 2.4 GHz, 900 MHz
and 868 MHz though using 2 MHz each
• It is a Personal Local Network and it can transmit the
data from 10 to 100 m depending on power and
environment situations
• It has a data rate of 250 Kb/s
• It supports large number of nodes (64000)

11. Topologies of ZigBee
• ZigBee supports 3 types of topologies
 Star topology
 Mesh topology
 Cluster tree topology

12. Applications of ZigBee

13. Comparison between WIFI,
Bluetooth and ZigBee

14. Thank You