Abstract
The cognitive femtocell is an inspiring technology that solves the indoor coverage problem in future cellular networks also Cognitive radio (CR) support dynamic spectrum access. In this paper, a new dynamic spectrum allocation method for hybrid access cognitive femtocell is proposed. In the proposed method, the macro base station (BS) allocates a portion of subchannels to the femto access point (FAP) to serve the macro users (MUs). Then, the FAP allocates the subchannels and power to maximize the femtocell network utility, whereas the throughput of the served MUs is guaranteed. Moreover, there is problem of resource allocation and we formulate that problem as sum utility maximization problem and we solve the problem by using dual decomposition method.
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