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For an energy harvesting wireless network (EHWN), power oscillation will occur in uplink signal-to-interference-plus-noise ratio-based power control if some energy-non-supported nodes exist. Power oscillation will destroy power control algorithm's convergence and influence the system's stabilisation no matter the EHWN is feasible or infeasible. Unfortunately, existing algorithms cannot avoid the power...
Despite the advantages of deploying femtocells into cellular networks, the consequent cross-tier interference has seriously limited the network performance. Applying different power control techniques has been heavily discussed in 3GPP as an efficient approach for handling dominant interference scenarios. Instead of relying on system level simulations, this paper evaluates an analytical uplink power...
Energy efficiency and spectral efficiency are two important aspects of wireless system. In this paper, a distributed scheme of energy-efficient power control is addressed jointly with 3D-beamforming (3D-BF), named as energy-efficient 3D-beamforming (EE-3DBF). In consideration of the high complexity to deal with power control and 3D-BF simultaneously, EE-3DBF is divided into limited coordination downtilt...
Despite the advantages of deploying femtocells into cellular networks, the consequent cross-tier interference has seriously limited the network performance. In the downlink, specially, the strong interference from Femtocell Base Stations (FBSs) to nearby macrocell users (MUEs) causes significant coverage holes. Applying different power control techniques has been heavily discussed in 3GPP as an efficient...
Performance degradation of Cell Centre UEs (CCUs) and "Interference Flooding" phenomenon may happen in Single-Carrier Frequency Division Multiplexing Access (SC-FDMA) uplinks. To decrease the impact of Interference Flooding and improve the CCUs' throughputs, this paper proposes a UE-Interfering-Area (UIA) based Inter-Cell Interference Coordination (IOC) scheme. Using UIA scheme, the eNodeB...
A cognitive radio should avoid interference from secondary users to primary users. However, the unknown location of primary receiver makes the problem hard to solve. This paper proposes a novel primary receiver detection to change the passive state of primary receivers. Primary receiver informs the secondary user it's licensed receive frequency according to semaphore architecture via mapping method...
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