Motorola WT41N0, Руководство интегратора

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CHAPTER 6 BLUETOOTH
Introduction
Bluetooth-equipped devices can communicate without wires, using frequency-hopping spread spectrum
(FHSS) RF to transmit and receive data in the 2.4 GHz Industry Scientific and Medical (ISM) band (802.15.1).
Bluetooth wireless technology is specifically designed for short-range (30 feet/10 meters) communications and
low power consumption.
Wearable terminals with Bluetooth capabilities can exchange information (e.g., files, appointments and tasks)
with other Bluetooth enabled devices such as headsets, printers, access points and other wearable terminals.
Motorola wearable terminals with Bluetooth technology use the StoneStreet One Bluetooth stack. To program
Bluetooth within the wearable terminal refer to the StoneStreet One SDK, available at the Motorola Support
Central web site on the WT4100 product page.
Adaptive Frequency Hopping
Adaptive Frequency Hopping (AFH) is a method of avoiding fixed frequency interferers. AFH can be used with
Bluetooth voice. All devices in the piconet (Bluetooth network) must be AFH-capable in order for AFH to work.
There is no AFH when connecting and discovering devices. Avoid making Bluetooth connections and
discoveries during critical 802.11b communications. AFH for Bluetooth can be broken-down into four main
sections:
•
Channel Classification - A method of detecting an interference on a channel-by-channel basis, or
pre-defined channel mask.
•
Link Management - Coordinates and distributes the AFH information to the rest of the Bluetooth network.
•
Hop Sequence Modification - Avoids the interference by selectively reducing the number of hopping
channels.
•
Channel Maintenance - A method for periodically re-evaluating the channels.
NOTE
The Voice Only WT41N0 requires the use of a Remote Desktop software to configure settings and
software. See
Voice Only WT41N0 Remote Control on page 4-1
for information on setting up the device
with remote desktop software.