Global Specialties ARX-WRL, Инструкция по эксплуатации

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2. Bluetooth
2.1 History
The Bluetooth technology was developed by the company Ericsson.
Bluetooth is an open standard for wireless transmission between
units over short distances. Just imagine mobile radio units with a
wireless headphone connection or data transfer between mobile ra-
dio units or a GPS receiver that sends wirelessly data to a
phone.
In 1994, Ericsson developped Bluetooth as a wireless way of com -
munication between mobile radio units and other systems.
Jaap Haarsen who worked at that time for Ericsson, developed the
most important technical part. The name Bluetooth comes from the
king of the vikings Harald Bluetooth. Initially, Bluetooth was the
name of the project and as no better alternative had been found,
this name has been kept for the end product.
The communication system spreads very quickly and after a short
time, the biggest electronic companies come together to set up the
‘Bluetooth Special Interest Group’ (SIG).
A worldwide application needs to be made available worldwide.
Therefore a universally applicable frequency has been searched and
found in the 2,45GHz frequency range.
2.2 Technology
Bluetooth is a radio transmission of speech and data over short
distances. The selected communication structure is a point to multi-
point link which means that one transmitter can transmit to several
receivers. As soon as two Bluetooth units start communicating, a
so-called
"
piconet
"
is set up. Several pico networks make a scatter
network.