Figure 1
From: Cognitive radio for vehicular ad hoc networks (CR-VANETs): approaches and challenges

Opportunistic spectrum use for V2V. RSU, roadside unit; DSRC, dedicated short-range communication.
From: Cognitive radio for vehicular ad hoc networks (CR-VANETs): approaches and challenges
Opportunistic spectrum use for V2V. RSU, roadside unit; DSRC, dedicated short-range communication.