Authors : S. Nagarani and C.V. Seshaiah
Abstract: OFDM is becoming an active and promising domain for the next generation of wireless systems due to its intrinsic resistance to frequency selective multi-path fading and its flexibility in resource allocations. Recently, resource allocation in OFDM has been attracting various researches in the field of wireless networking. It has been observed recently that the integration of OFDM and relay networks are providing significant performance. A novel technique for resource allocation is presented in this study which dynamically allocates subcarriers, bits and power to the existing links based on instant channel state information. The main aim of this approach is to minimize the power required for the transmissions of the Base Stations (BS) and the Relay Stations (RS) through an efficient swarm intelligence based optimization technique. Artificial Bee Colony (ABC) is utilized in this approach for providing the optimized results. The performance evaluation of the proposed ABC based resource allocation technique suggests that the essential power required is lower than the power required by other existing resource allocation techniques in a defined scenario of a relay network.
S. Nagarani and C.V. Seshaiah, 2012. Artificial Bee Colony Optimization Based Dynamic Resource Allocation for OFDMA-Based Relay Networks. International Journal of Soft Computing, 7: 271-280.