Tradeoff Between CPAN Size and the Number of Working Channels

Cognitive personal area networks build the available channel map by using cooperative sensing of primary channels by piconet members. Number of primary channels is usually larger than the number of piconet members available for channel sensing. This means that at the given time only a subset of primary channels will be sensed and that information about channel state of the other channels will be inaccurate. In this paper we try to establish the dependency of the sensing error on the number of sensors (piconet members) and the number of primary channels. Results show that a number of sensors which is about one-half of the number of channels allows the sensing error to remain below 1%.