Bluetooth-specifications-

Bluetooth Specifications

Below, you'll find several specifications for the well known Bluetooth:

. Throughout the United States and even Europe, the range of frequency is , - ,. MHZ, with -MHz RF (radio frequency) channels. The frequency range in Japan is , to , MHz with -MHz RF channels.

. A data channel of Bluetooth randomly hops , times per second between the RF channels.

. Each Bluetooth channel is divided into time slots, with each one being microseconds long.

. A Bluetooth piconet has one master and up to seven slaves. The master will transmit in even time slots, while the slaves will transmit in odd time slots.

. The data in a single packet can be up to , bits in length.

. Currently, there are two types of data transfer between devices - SCO (synchronous connection oriented) and ACL (asynchronous connectionless).

. In a Bluetooth piconet, there can be up to three SCO links containing , bits per second with each one. To help avoid collision and timing problems, the links of the SCO will use reserved slots set up by the master.

. A master can support up to three SCO links with either one, two, or even three slaves.

. The slots not reserved for the SCO links can be used for ACL links.

. A single master and slave can have one ACL link.

. ACL is either master to one slave (point to point) or it broadcasts to all of the slaves.

. The ACL slaves will only transmit when it has been requested by the master. If the master doesn't make the request, the ACL slaves won't transmit anything at all.

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