Читать книгу Dynamic Spectrum Access Decisions - George F. Elmasry - Страница 90

Metric name: Rippling.

Metric description: The stability of the assigned spectrum.

Metric measured property: Time.

Metric scale: Minutes.

Metric source: The DSA cognitive engine can track the time between two consecutive frequency updates.

Note: Rippling can have a negative impact on the previous metric (meeting global throughput). It can reduce the network throughput. This metric can be measured at the node level, at the gateway level, and at the central arbitrator level. The rippling impact at higher levels (e.g., central arbitrator) can have much worse impact than rippling at the local node. Evaluation of this metric depends on where it was measured.