Sunday, May 21, 2006
Bluetooth???
Hi Peter, How does Bluetooth work?? John in Nambucca.
Hi John,
Bluetooth is a type of wireless networking that takes connecting computer devices to the next level by removing the need for user intervention and keeping transmission power extremely low.
Bluetooth is essentially a networking standard that works at two levels:
It provides agreement at the physical level -- Bluetooth is a radio frequency standard.
It provides agreement at the protocol level, where products have to agree on when bits are sent, how many will be sent at a time, and how the parties in a conversation can be sure that the message received is the same as the message sent.
The big plus of Bluetooth is that it is wireless, inexpensive and extremely automatic. However, this plus is also a downfall as many malware writers have created viruses that can be automatically transferred between phones unless the phone is has its security turned on. I work in a busy night club and last night I left my blue tooth on my phone turned on but allowed it to prompt me before allowing access a quick scan and in a room which holds 250 people and was at capacity I received 180 requests for connection to my phone.
Bluetooth has two standards, the older Bluetooth 1.0 standard has a maximum transfer speed of 1 megabit per second (Mbps), while Bluetooth 2.0 can manage up to 3 Mbps. Bluetooth 2.0 is backward compatible with 1.0 devices.
Bluetooth networking transmits data via low-power radio waves a frequency of 2.45 gigahertz) This frequency band has been set aside by international agreement for the use of industrial, scientific and medical devices (ISM).
When Bluetooth-capable devices come within range of one another, electronic chatter takes place to negotiate and determine if they have data to share or whether one needs to control the other. This electronic chatter happens automatically unless the user has set that manual intervention is required.. Once the chatter has occurred, the Bluetooth devices -- whether they're part of a computer system, a camera, a mobile phone or even an audio device form a network. Bluetooth systems create a personal-area network (PAN), or piconet, that may fill a room or may encompass no more distance than that between the cell phone on a belt-clip and the headset on your head. Once a piconet is established, the members randomly hop frequencies in unison so they stay in touch with one another and avoid other piconets that may be operating in the same room.
More information can be found on http://electronics.howstuffworks.com/bluetooth1.htm
Hi John,
Bluetooth is a type of wireless networking that takes connecting computer devices to the next level by removing the need for user intervention and keeping transmission power extremely low.
Bluetooth is essentially a networking standard that works at two levels:
It provides agreement at the physical level -- Bluetooth is a radio frequency standard.
It provides agreement at the protocol level, where products have to agree on when bits are sent, how many will be sent at a time, and how the parties in a conversation can be sure that the message received is the same as the message sent.
The big plus of Bluetooth is that it is wireless, inexpensive and extremely automatic. However, this plus is also a downfall as many malware writers have created viruses that can be automatically transferred between phones unless the phone is has its security turned on. I work in a busy night club and last night I left my blue tooth on my phone turned on but allowed it to prompt me before allowing access a quick scan and in a room which holds 250 people and was at capacity I received 180 requests for connection to my phone.
Bluetooth has two standards, the older Bluetooth 1.0 standard has a maximum transfer speed of 1 megabit per second (Mbps), while Bluetooth 2.0 can manage up to 3 Mbps. Bluetooth 2.0 is backward compatible with 1.0 devices.
Bluetooth networking transmits data via low-power radio waves a frequency of 2.45 gigahertz) This frequency band has been set aside by international agreement for the use of industrial, scientific and medical devices (ISM).
When Bluetooth-capable devices come within range of one another, electronic chatter takes place to negotiate and determine if they have data to share or whether one needs to control the other. This electronic chatter happens automatically unless the user has set that manual intervention is required.. Once the chatter has occurred, the Bluetooth devices -- whether they're part of a computer system, a camera, a mobile phone or even an audio device form a network. Bluetooth systems create a personal-area network (PAN), or piconet, that may fill a room or may encompass no more distance than that between the cell phone on a belt-clip and the headset on your head. Once a piconet is established, the members randomly hop frequencies in unison so they stay in touch with one another and avoid other piconets that may be operating in the same room.
More information can be found on http://electronics.howstuffworks.com/bluetooth1.htm
# posted by Peter Saville - IT Consultant @ 1:40 pm 
