A Cognitive Radio-Based Energy-Efficient System for Power Transmission Line Monitoring in Smart Grids

Figure 2

Frame organization of the proposed energy-efficient channel allocation scheme: (a) frame structure of cognitive poles for control messaging, channel switching, and data transmission when the channels are assigned by the CRGW; (b) frame structure of cognitive poles for control messaging and idling duration when the channels are not assigned by the CRGW.

(a)

(b)