Bluetooth Technology : Introduction
- Bluetooth technology is a wireless technology based on mobile computing technology. Being an open wireless technology standard, it is used to send or receive data to connected devices present across a certain distance i.e. it uses a band of 2.4 to 2.485 GHz.
- Bluetooth is also known as IEEE 802.15 standard.
- The developing unit of this technology is a group of 5 companies called as Special Interest Group which was formed in 1998. The companies are Ericsson, Intel, IBM, Nokia and Toshiba.
- The range of Bluetooth technology over which data can be exchanged is less than 10 meters but, the latest version of Bluetooth i.e. Bluetooth 5.0 can exchange data in a range of about 40-400 meters.
- The speed at which data transmission occur is around 1 mbps.
Bluetooth Technology : Architecture
- An architecture of Bluetooth is called as a “Piconet”.
- Piconet offers the technology with the help of which data transmission occurs, based on is nodes i.e. Master node and Slave Nodes.
- A master node is a node from which data is being sent and slave node is which the data is received.
- Ultra-High frequency and short wavelength radio waves, through which data transmission occurs.
- The Piconet used the concept of multiplexing as well as spread spectrum i.e. it is a combination of code division multiple access and frequency hopping spread spectrum.
- Maximum number of Master Node → 1
- Maximum number of Slave Nodes → 7
- Maximum number of Nodes in a Piconet → 8
- Maximum number of devices that can be paired → 28 – 1 = 255
- Number of devices that can be parked → Infinite(∞).
- A parked node is a node which is ready to be connected and stand by node is a node which can either become a slave or parked node or either remains idle/disconnected.
- Also, data transmission can only occur between master and slave nodes and not between slave and slave nodes.
- If the connection from master node gets disconnected, the whole Piconet gets disconnected.
- If two master nodes are connected together, then that network is called as Scatter-net.
- We can thus conclude that with the increase in number of slaves/devices in a Piconet the data transmission speed decreases and if number of slaves/devices in a Piconet decreases then the data transmission speed increases.
Advantages : Bluetooth Technology
- Wireless technology.
- Very simple to form a Piconet.
- Cheap Technology.
- Low energy consumption.
Disadvantages : Bluetooth Technology
- Low in bandwidth.
- Data transmission range is a constraint as it is very less.
Applications : Bluetooth Technology
- Blue-tooth Speakers.
- Blue-tooth Headphones.
- Blue-tooth Headsets(for calling purpose).
- Wireless mouse and keyboard.
- Blue-tooth gaming consoles.