Overview of wireless network
- 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.
- 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
- 13. Comparison between WIFI, Bluetooth and ZigBee
- 14. Thank You