Proportional Share Scheduler for Radar Network Virtualization

In the area of sensor network virtualization, researchers from the distribution thrust have developed a proportional-share scheduler. This scheduler decides when to execute requests from virtual sensors on the physical sensor. The scheduler, which is based on Actuator Fair Queuing (AFQ), enforces proportional shares by allocating sensing time in proportion to a set of assigned weights, as shown in the figure below. In other words, this method allows the prioritization of one virtual sensor over the other when it comes to access of the actual physical sensor. As shown in the figure below, with equal weights for both sensors, each virtual sensor gets the same amount of access time to the physical sensor. If the weight for one of the two virtual sensors is increased, its access time increases while the time for the other virtual sensor stays constant. This method allows for completely isolated use of the sensor node (in this case, a radar), while the overall share of the physical sensor for each virtual sensor can be determined at the management level of the node.