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In this paper, we propose an user-oriented graph based frequency allocation algorithm for downlink transmission in the heterogeneous network. As different users may use different communication service, they would have different data rate requirement. It is critical to fulfill all users' traffic demand before enlarging the system throughput. So, the optimization objective is simultaneously improving...
In this paper, a joint control method for the user association and almost blank sub-frame (ABSF) based interference coordination (IC) technique in heterogeneous cellular networks is proposed. The optimization objective is simultaneously improving system throughput and guaranteeing proportionally fairness. Usually, user and base station (UE-BS) association is performed before ABSF rate determination,...
Advanced interference coordination and resource management schemes are important in heterogeneous wireless networks in order to achieve a high network capacity and good user experience. In this paper, we present a joint consideration of the sub-channel allocation and power distribution in MIMO two-tier networks where the femtocells form clusters of equal size. All of the BSs have a multi-antenna configuration...
In spectrum aggregation (SA), two or more component carriers (CCs) of different bandwidths in different bands can be aggregated to support wider transmission bandwidth. The current resource scheduling schemes for spectrum aggregation are not optimal or suitable for CR based heterogeneous networks (HetNets). Consequently, the authors propose a novel resource scheduling scheme for spectrum aggregation...
In spectrum aggregation (SA), two or more component carriers (CCs) of different bandwidths in different bands can be aggregated to support wider ransmission bandwidth. CC selection is the new radio resource management (RRM) functionality introduced in LTE- Advanced. The current CC selection schemes do not consider the cognitive radio (CR) condition and are not suitable for CC selection in CR. Consequently,...
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