Evaluation of Interference Requirements in a Sensor Network Aided Cognitive Radio System

To better exploit the spectrum resources a wireless sensor network can be used to assists a secondary cognitive radio network by providing information about the current primary spectrum occupancy. In this paper, the authors study the performance of the secondary network when it is co-located with and having similar cell size as a mobile primary network that uses a cellular reuse pattern with seven frequencies. Especially they study how relaxed requirements for the maximum interference generated by the cognitive radios affect the performance of the secondary and primary network in terms of throughput, packet loss, delay, coverage and connectivity.