Research Article
An Enhanced Reliable Access Scheme for Massive IoT Applications in Ubiquitous IoT Systems
| Type | Priority | Characteristics | Application |
| HD | 1 (high) | Unpredictable, low repetition rate, high real-time and reliability requirements | Fault alarm, emergency shutdown | LD | 2 (medium) | Predictable, high repetition rate, high real-time and reliability requirements | Pressure control, airflow control | PD | 3 (low) | Predictable, high repetition rate, low real-time and reliability requirements | Temperature monitoring, humidity monitoring |
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