Connectivity - Philips DreamStation 2 User Manual

5. Connectivity

QoS: Wireless Quality of Service (QoS) refers to the necessary level of service and
performance needed for the wireless functions of the device. It involves parameters such as
reliability of data transmission, effective transfer rate, error rate, and mechanisms to define
priority levels for time-critical signals.
Bluetooth® QoS: Bluetooth uses frequency hopping, channel coding, and error correction
to address interference and is designed to operate with other devices that occupy the same
spectrum. In addition to the measures defined in the Bluetooth standard, the DreamStation
2 radio incorporates other methods to minimize likelihood of QoS problems. These include:
— Data sent between the CPAP and any external devices use an additional checksum
verification to ensure that data is correctly received without errors.
— For all Bluetooth applications except pulse oximeter: The CPAP is a portable device
and will not always be near the mobile device when the CPAP is ready to transfer
data. The mobile device attempts to reconnect until it successfully connects and the
data transfer is complete.
— For use with pulse oximeter: The radio receives pulse rate and O
second and stores that data along with the time stamp. The data from the pulse
oximeter is checked for validity and thrown away if not valid. This data is not
displayed locally but is logged, and after a minimum of 4 hours of data is collected
it is sent to the remote server. If the CPAP is not able to get 4 hours of good data it
alerts the patient, and the patient will need to use it again the next night. The data
is not used to diagnose the patient's condition, and will continue to reconnect to
the pulse oximeter until a connection is achieved.
Cellular QoS
The Cellular modem is designed for use with select Philips Respironics therapy devices. It
automatically transfers data between the DreamStation 2 device and Philips Respironics
proprietary compliance software. The DreamStation 2 modem incorporates various
methods to minimize likelihood of QoS problems. These include:
— No real time data monitoring is used in this application. If the data transfer is
unsuccessful, the modem attempts to reconnect until it successfully connects and
the data transfer is complete.
— Data sent between the CPAP and any external devices uses an additional checksum
verification to ensure that data is correctly received without errors.
For information on Bluetooth use and pairing, see the "Bluetooth wireless technology" and
"Pairing your therapy device to your Bluetooth-enabled mobile device" sections of this
manual.
level once per
2
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