Bluetooth (IEEE 802.15.1)
Bluetooth was invented in 1994 by Ericsson.
Bluetooth is a high-speed, low-power microwave wireless link. Technology, designed to connect phones, laptops, PDAs and other portable equipment together with little or no work by the user.
Features:
- Operates in licensed exempt ISM band at 2.4Ghz
- Uses frequency hoping spread spectrum
- Omni directional, no requiring line of sight
- Bluetooth offers data speeds of up to 1 Mbps up to 10 meters (Short
- range wireless radio technology )
- Unlike IrDA, Bluetooth supports a LAN-like mode where multiple devices can interact with each other.
- The key limitations of Bluetooth are security and interference with wireless LAN's.
Connection Establishment in Bluetooth:
1. Inquiry: The device on reaching a new environment would automatically
initiated an inquiry to find out what access points are within its range.
2. Paging: The device will invoke a base band procedure called paging.
3. Link establishment: The LMP will now establish a link with the access point.
Applications of Bluetooth:
- Allows a transfer of images (or) word documents (or) applications (or) audio and video files between devices without the help of cables.
- It can be used to setup a personal area network (PAN) or a wireless personal area network (WPAN).
- It is used in wireless mouse and keyboard.
- It also used in printers.
👇BEST LAPTOP UNDER Rs.50000/-👇
No comments: