Method and apparatus relating to spectrum sensing

摘要

The invention presents methods and corresponding device relating to cooperative spectrum sensing. First a candidate set of sensors that can participate in an occasion of cooperative spectrum sensing is obtained. A cost formula for calculating a cost associated with using sensors from the candidate set in the cooperative spectrum sensing is then defined (75; 107, 97). The candidate set is partitioned (29; 14, 145) into an active set and a passive set. The active set contains any sensor (s) from the candidate that is to participate in the cooperative spectrum sensing. The passive set includes any sensor (s) that is not to participate in the cooperative spectrum sensing. The partitioning of the candidate set is done by applying an optimization procedure (79, 81, 83; 111, 113, 115) which performs a constrained optimization of the cost in accordance with the defined cost formula.

主权项

1. A method relating to cooperative spectrum sensing, the method comprising:
Obtaining, by a sensor selector, a candidate set of sensors that are available to participate in the cooperative spectrum sensing, wherein spectrum sensing is the act of determining, by monitoring radio transmissions, whether a particular spectrum band is currently at least in part free for use, wherein the sensor selector comprises a processor and a memory unit and the step of obtaining the candidate set is performed by the processor; defining a cost formula for calculating a cost associated with using sensors from the candidate set in the cooperative spectrum sensing; and partitioning, by the processor, the candidate set into an active set containing one or more sensors of the candidate set to participate in the cooperative spectrum sensing and a passive set containing one or more sensors of the candidate set not to participate in the cooperative spectrum sensing by applying an optimization procedure which performs a constrained optimization of the cost in accordance with the defined cost formula.