Qiaoni Han

Learn More
—Cellular networks are now rapidly evolving to the renewable heterogeneous network (HetNet) architectures, where a mixture of macro base stations (BSs) and small cell BSs coexist. Particularly, these BSs are partly-powered or self-powered by renewable energy sources (RES). In this context, joint user association and resource allocation is challenging. In(More)
This paper is concerned with the dead zone problem of uplink communication in two-tier femtocell network. In the uplink communication, the interference generated by a macrocell user at the edge of the macrocell base station (MBS) coverage area may cause the signal-to-interference-plus-noise ratio (SINR) received at the nearby femtocell base station (FBS)(More)
—This paper investigates the energy efficient resource allocation for orthogonal frequency division multiple access (OFDMA) relay systems, where the system is supplied by the conventional utility grid and a renewable energy generator equipped with a storage device. The optimal usage of radio resource depends on the characteristics of the renewable energy(More)
—We study the relay station (RS) sleep control mechanism targeting on reducing energy consumption while improving users' quality of service (QoS) in green relay-assisted cellular networks, where the base station (BS) is powered by grid power and the RSs are powered by renewable energy. By adopting green RSs, the grid power consumption of the BS is greatly(More)
In an increasingly dense and heterogeneous wireless network with various access points, the users are likely to lie in the overlapping coverage areas of multiple radio access technologies, which motivates the boost of user throughput and quality of service via small cell dual-connectivity. In this paper, with the objective of improving network throughput(More)