Extracting the channel allocation information in a spectrum pooling system using cyclic feature detection

Spectrum pooling is a resource sharing strategy, which allows a license owner to share a sporadically used part of his licensed spectrum with a renter system, until he needs it himself. For a frictionless operation of a spectrum pooling system, the license owner has to have the absolute priority to access the shared spectrum. This means, the renter system has to monitor the channel and extract the channel allocation information (CAI), i.e. it has to detect, which parts of the shared spectrum the owner system accesses to, in order to immediately vacate the frequency bands being required by the license owner and to gain access to the frequency bands, which the license owner has stopped using. This paper proposes using cyclic feature detection for the extraction of the CAI in a specific spectrum pooling scenario, where the license owner is a GSM network and the spectrum renter is an OFDM based WLAN system.