A realization of cognitive pilot channels through wireless billboard channel infrastructure for cognitive radio

This paper proposes an out-band cognitive pilot channel (CPC) solution for cognitive radio systems and networks. The solution exploits wireless billboard channel (WBC) technology which was originated to play a key role in a ubiquitous consumer wireless world (UCWW) environment [1, 2]. The paper shows how the WBC technology and variety of potential WBC downlink platforms match the requirements of the CPC scheme, with their main goal of enabling the transfer to mobile terminals (MTs) of available knowledge of the wireless operational and geographical environment, established policies and internal state of any usable and accessible `cognitive spectrum´. The paper sets out the three-layer WBC/CPC system architecture, with specific emphasis on the top service layer and the CPC `service descriptions´, and includes also details on the link and physical layers for a `WBC/CPC over DVB-H´ platform.