Collaborative Sensing Scheme for CR in XG Networks
Olayinka Taibat Jinadu, Folake Akinbohun, Victor Korede Owa · 2015
Cognitive Radio (CR) technology, the building block of next generation (xG) network help mitigate spectrum scarcity in the paradigm shift to dynamic spectrum access (DSA) approach of wireless communication. Reliable communication is guaranteed when licensed (primary) and un licensed (secondary) spectrum users co-operatively utilize the s pectrum. Though, radio spectrum is statically allocated to different services, applications and users, observations showed spectrum usage is low despite increase in wireless communication needs. Required effective spectral utilization is hinged on secondary user’s (SU) ability to detect primary user’s (PU) signals accurately and make use of an y time the frequency is unoccupied. Major task of PU detection relied on SU sensing technique. Analysis of existing schemes showed SNR computable in adv ance for av ailable channels. Improved technique of collaborative spectrum sensing (CSS) for energy detection in CR-super-layer and correct detection rate (CDR) algorithm on logical (PHY + MAC + Netw ork) structure is formulated for reliable channel sensing results. CSS algorithm is equipped to track all changing environment condition in terms of each SNR o btainable to be used for CDR p robability schemes. Remarkable improvement in sp ectrum usage efficiency is achieved with suggested sensing scheme and the inclusive algorithm because collaborative SU’s SNR computation in AWGN channels enabled suggested algorithm track changing environment parameters effectively for optimized spectrum hole detection and usage.