APPARATUS AND METHOD FOR ENQUIRING INFORMATION ON CHANNEL CONDITION COGNITIVE RADIO WIRELESS COMMUNICATION SYSTEM

摘要

PURPOSE: An apparatus and a method for requesting information on a channel condition in a wireless cognitive communication system are provided to use a database having band scheduling information of a system with a license, thereby exactly determining whether to use a channel. CONSTITUTION: A base station recognizes activation inside a cell of an apparatus(201). A DB server recognizes a change of radio resource scheduling information of the system with a license(207). The DB server re-calculates each EIRP Cap of apparatuses. The apparatuses are registered in a list. The recalculated EIRP Caps are sent to the base station(209). The base station recognizes EIRP calculation-related information of an apparatus inside a cell of the base station during communication according to the recalculated EIRP_Cap(211).