Abstract:

A multicell adaptive resource allocation (MARA) scheme was proposed for downlink Orthogonal Frequency Division Multiple Access (OFDMA) cellular system. In order to reduce the complexity of the system, the processes of subchannel allocation and power allocation was separated. The subchannel was dynamically allocated in every cell, and then the transmit power was allocated among the co-frequency users of adjacent cells based on the results of subchannel allocation. The non-cooperative game theory was employed in the multicell power allocation, and a multicell distributed power allocation algorithm was presented via pricing function. Transmit power levels of co-subchannels in the adjacent cells were coordinated, in that inter-cell interference was mitigated and radio resource utility was improved. Simulation results show that the MARA could increase throughput of the system.

Key words: orthogonal frequency division multiple access, resource allocation, inter-cell interference, non-cooperative game