Controlling the Interference From Multiple Secondary Systems at the TV Cell Border
The main requirement for secondary operation over the TV white spaces is interference control. In this paper, the authors propose an interference control scheme that allows multiple secondary systems to maintain their aggregate interference at the TV receivers under specific protection limits. The main characteristic of the proposed scheme is the small signaling overhead required for the cooperation between the secondary systems. The secondary systems need only to communicate their locations to a central network controller. The controller can then allocate the transmission power levels to the different systems such that the TV receivers are sufficiently protected.