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Device-to-device (D2D) cooperation can improve both the system performance and Quality of Services (QoS) of users with bad channel qualities. However, cooperation consumes valuable power of a terminal to help others and thus is not preferred by the terminal. So it is important to design schemes to stimulate selfish terminals to cooperate. Defining energy efficiency as incentive parameters, this paper...
In heterogeneous networks of low power Pico Base Station (PBS) overlaid with Macro Base Station (MBS), cell range expansion (CRE) which add a positive bias in PBS for cell association is proposed to offload user equipments (UEs) to PBSs. In this way UEs in CRE region that associated to PBS with weak signal power may experience strong cross-tier interference from MBS. To manage this interference, almost...
In this paper, a novel radio admission control (RAC) scheme is proposed for handling multiclass services in Long Term Evolution (LTE) systems. An objective function of maximizing the number of admitted users is proposed to evaluate the system capacity. To solve the optimization problem, we present a combined complete sharing (CS) and virtual partitioning (VP) resource allocation model and develop...
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