Kaifeng Han

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The skyrocketing increase of mobile traffic exacerbates the stringent demand for high spectrum efficient communications. In this paper, a spectrum reuse scheme is proposed for heterogeneous networks (HetNets) using Stackelberg game approach to decrease cross-tier interference, thereby effectively improving spectrum efficiency. The macro base stations (BSs),(More)
In the heterogeneous networks (HetNets) powered by hybrid energy sources, it is imperative to reduce the total on-grid energy consumption as well as minimize the peak-to-average on-grid energy consumption ratio, since the large peak-to-average on-grid energy consumption ratio will translate into the high operational expenditure (OPEX) for mobile network(More)
Future Internet-of-Things (IoT) will connect billions of small computing devices embedded in the environment and support their device-to-device (D2D) communication. Powering this massive number of embedded devices is a key challenge of designing IoT since batteries increase the devices’ form factors and their recharging/replacement is difficult. To tackle(More)
The rising environmental awareness and the exponential growth of capacity demand have made energy efficiency an important issue to be addressed by cellular network operators. In this paper, an energy-efficient user association scheme is proposed for heterogeneous networks (HetNets) using an evolutionary game theoretic approach to maximize the energy(More)
Since the concept “cloud computing” was first put forward, arguments about its data security have been lasting, which involve two aspects. One is how to keep the information of client from hackers, the other is the assurance of security and accuracy when passing data to users. This paper shall explore in depth the solutions to security issues(More)
It is envisioned that next-generation wireless networks will provide users ubiquitous low-latency computing services using devices at the network edge, called mobile edge computing (MEC). The key operation of MEC, mobile computation offloading (MCO), is to offload computation intensive tasks from users. Since each edge device comprises an access point (AP)(More)
Millimeter-wave (mmWave) communication opens up tens of giga-hertz (GHz) spectrum in the mmWave band for use by next-generation wireless systems, thereby solving the problem of spectrum scarcity. Maintaining connectivity stands out to be a key design challenge for mmWave networks deployed in urban regions due to the blockage effect characterising mmWave(More)
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