Design of subject-oriented ontology for IEEE 802.22 cognitive access networks

There is a problem of heterogeneous data analysis for cognitive communication networks concerning the secondary users spectrum access control. The end goal of the subscriber access control is to assess in real time the basic conditions under which a secondary user would not interfere with the main user of the same spectrum. The most common way to solve this problem is to determine a set of mandatory rules for channel usage, although this method requires updating of the stored control programs. The article proposes an ontological channel usage method that is based on a subject-oriented ontology as well as on a set of logical rules for deriving user equipment technical parameters. Designed rules are based on the cognitive communication standard defining the usage of TV White Spaces. The proposed method allows to fully or at least partially eliminate the need for updating of stored control programs by utilizing the logical solver engine. The reasoner for an ontology-based control system uses facts to automatically form a set of logic rules for adjusting user equipment settings. The resulting set of facts and rules is then formalized using Web Ontology Language and is then presented to an expert for review and correction. The proposed method contains the information architecture model for the user equipment and provides the flexibility in adjusting the settings for radio equipment operating in cognitive access networks of IEEE 802.22 standard utilizing TV White Spaces.