Dynamic Allocation of Subcarriers and Powers in a Multiuser OFDM Cellular Network

This paper considers a resource allocation problem in the downlink of a multiuser, multicell OFDM cellular network with frequency selective fading and imperfect channel state information. Each user has a given data rate requirement. The task is to determine power and subcarrier allocations for users to ensure that users’ outage probabilities are low. A two-layer approach is used. The higher layer allocates powers based on the average gains of the links, with cells coupled via the mutual interference between them. To improve the performance in frequency selective fading, the lower layer allocates discrete subcarriers to the users in a way which takes into account statistical knowledge about the subcarriers.