Performance Evaluation of Centralized Control Algorithm for Channel Allocation in Pico-Cell System

In a pico-cell architecture, co-channel interference between adjacent cells can cause serious problems. With a centralized control approach based on interference information reported by each Subscriber Station (SS), the authors propose a novel channel allocation algorithm applying the graph theory. This method directly determines the optimal channel allocation and minimizes inter-cell co-channel interference. Both computer simulations and experiments based on the implementation demonstrate that their proposed algorithm is effective. In future mobile communications systems, the frequency band will be higher and the bandwidth wider, so that cell size will be smaller and blind zones will increase.