10
TI 01W06A51-10EN
• PER (Packet Error Rate)
Indicates the communication failure rate when wireless communication is established actually.
The PER value is calculated as shown below.
PER (%) = Number of packets that were not sent correctly ÷ Total number of sent packets x 100
(%)
When packets sent from the Sushi Sensor did not arrive at the gateway, or the system failed
toreceive the delivery acknowledgment packet (ACK) from the gateway although it received the
sent packets, it is judged that sending has failed.
The Sushi Sensor resends the packets when sending has failed. When the PER value is low, it is
judged that the communication is successful with fewer number of data transmission. When the
PER value continues to be high, affects the battery life due to the number of retransmission.
In the Sushi Sensor system, check the PER value using the following method.
PER measuring
device
Checking method
PER from Sushi Sensor to
gateway communication
Sensor
• Health report the application is periodically notified of
by the sensor
For details on the checking method, refer to the instruction manual of the Application and each
sensor.
Mar.26,2019-00
