Research Article
Optimization of Cognitive Radio Secondary Information Gathering Station Positioning and Operating Channel Selection for IoT Sensor Networks
| Transmitting power | , , | Transmitting power of SIGS, PUs, and SID | Set of primary or secondary systems | | PBS set using channel j | | SIGS set using channel j | {} | Set of unit cells that belongs to the SIGS | Channel gain | | Channel gain between the PBS and the unit area (SID) using channel j | | Channel gain between the unit area and the SID using channel j | | Channel gain between the SIGS and the SID using channel j | | Channel gain between the SIGS and the SID using channel j | | Channel gain between the unit area and the PBS using channel j | | Channel gain between the PBS and the PBS using channel j | Number of unit areas | | Number of unit areas covered by a SIGS | | Number of unit areas covered by a PBS | Coverage range | | Coverage radius of the PBS | | Coverage radius of the SIGS | Appearance probability | | SID appearance probability in the unit area | Noise | | Noise density |
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