Research Article
BTP: A Bedtime Predicting Algorithm via Smartphone Screen Status
| | Target | Event Code | Meaning |
| | Record screen status | SON | Screen light up | | SOFF | Screen extinguish |
| | Filter period not at home | AH | Arrive at home | | LH | Leave home |
| | Filter unexpected interrupt | IC | Incoming call | | RM | Receiving message | | AN | App notifications |
| | Record alarm clock status | ACR | Alarm clock ring |
| | Record power status | PON | Power on | | POFF | Power off |
| | Decide awakened or not | AA | Accelerometer activated |
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