METHOD, APPARATUS FOR DYNAMIC RESOURCE ALLOCATION METHOD IN OFDMA-BASED COGNITIVE RADIO SYSTEM AND FORWARD LINK FRAME STRUCTURE THEREOF

摘要

Provided are a dynamic resource allocation method and apparatus in an Orthogonal Frequency Division Multiple Access (OFDMA)-based cognitive radio system and a downlink frame structure of the method and apparatus. The method includes a base station (BS) selecting one of an Adaptive Modulation and Coding (AMC) subchannel allocation scheme, in which a subchannel comprising at least one bin comprising a first plurality of continuous subcarriers in a frequency domain, is allocated, and a diversity subchannel allocation scheme, in which a subchannel comprising a second plurality of scattered subcarriers in the frequency domain is allocated, according to a level of frequency selectivity of an unused idle frequency band; and the BS allocating at least one subchannel to a termin al according to the selected subchannel allocation scheme. Accordingly, downlink throughput in the cognitive radio system can be increased.