A METHOD FOR CONSTITUTING A LAYERED CELL IN OFDMA SYSTEM

摘要

The present invention relates to a mobile communication system using an OFDMA scheme, the present invention relates to a hierarchical cell arrangement method in an OFDMA system for multiple carriers. A hierarchical cell structure of the OFDMA system according to the present invention, a) dividing the L carriers having orthogonality in M ​​subchannels; b) dividing into N groups having a subchannel by one of M, respectively; c) by binding the N groups dogs arbitrary integer steps constituting a K of classes; And d) comprises the steps of configuring a plurality of hierarchical cell for the K classes. According to the invention, a plurality of the introduction of the independent class concept for the carrier and easily applied to a system that requires a separate radio areas, it is possible to easily design the sectors and cells in a single frequency, and, consisting of a plurality of groups by assigning a class to the independent sectors, eliminating the interference between the sectors, the respective sectors can be operated as an independent radio zone.