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Quality of Service for Wireless Technology
Bluetooth
®
Smart wireless technology enables
communication between the generator and the patient
controller. The quality of the wireless communication
link varies depending on the use environment
(operating room, recovery room, and home
environment).
After the patient controller is paired with a generator,
the Bluetooth wireless technology symbol is visible on
the patient controller screen. When the Bluetooth
Smart wireless technology connection is not active,
the symbol appears dimmed.
The quality of service (QoS) should allow wireless data
to be transferred at a net rate of 2.5 kB/sec. Each
connection interval includes a semi-duplex
transmission with a required acknowledge, a
transmission latency in each direction (2x), and a
receive-to-transmit mode (RX-to-TX) time. Data is
resent if not successfully received. Each key press
may transmit up to 4 data packets with up to 20 bytes
per packet, depending on the number of packets that
need to be transmitted (i.e., if there is only one packet
to transmit, only one packet will be transmitted). If the
interference is high (e.g., the bit error rate exceeds
0.1%), the user may experience what appears to be a
slow connection, difficulty pairing devices, and a need
to decrease the distance between connected devices.
