Energy Efficient Resource Allocation in OFDMA Networks Using Ant-Colony Optimization
A novel technique for jointly allocating sub-carriers, Modulation and Coding Scheme (MCS) and transmit power in an Orthogonal Frequency Division Multiple Access (OFDMA) cellular network using ant-colony optimization technique is proposed. Different combinations of user indices, MCS indices and subcarrier indices form the nodes in the graph. Each possible assignment of the above resources is a path in the graph. Resource allocation is carried out by mimicking the behavior of ants, that the ants are likely to choose the path identified as a shortest path, which is indicated by a relatively higher density of pheromone left on the path compared to other possible paths.