An auction algorithm for subchannel allocation in OFDMA networks with service differentiation

In this paper, we proposed an auction algorithm for the subchannel allocation in OFDMA cellular networks. This algorithm allows users to fairly compete for the using of the subchannel through a new bidding strategy. The bidding price is according to the difference between the logarithmic function of the data rate given by the subchannel at present slot and the long term average data rate. We introduce the active index to adjust the two parts contributing proportion to the bidding price and reveal the user´s different willingness to pay for different services. For each subchannel, the user bid highest will be allocated the subchannel. The auction procedure can realize a competitive fairness from the perspective of the users. Numerical result shows that the proposed algorithm achieves different degrees of tradeoff between the system efficiency and fairness by using different active index set and also can provide differentiated services for different users.