User association for energy harvesting relay stations in cellular networks

Abstract

We consider a cellular wireless network enhanced by relay stations that are powered by renewable energy sources. Such a network consists of the macro base stations (BS), relay stations (RSs), and many mobile stations (MSs). In addition to the traditional data/voice transmission between the BS and the MSs, a higher service tier may be provided by using the energy harvesting RSs for some MSs. We propose a network scenario utilizing the energy harvesting relay stations to improve the service quality without taking the additional licensed frequency band and transmission power, and design a user association algorithm for the energy harvesting RSs in such a network. The goal is to assign each MS an RS for relaying its signal to minimize the probability of the relay service outage, i.e, the probability that an MS's relay service request is rejected. First, we propose a network scenario and develop a mathematical model to estimate the rejection probability for a given user association. We then propose a low-complexity local search algorithm, which balances the computational complexity and the performance, to obtain a locally optimal user association. Simulation results are provided to demonstrate the superior performance of the proposed techniques over the traditional methods.

Stable Matching Relay Selection (SMRS) for TWR D2D Network With RF/RE EH Capabilities

“…To limit the interference experienced by the cellular user (CU) as a result of sharing the same channels with the D2D links, evolved NodeBS (eNBs) put restrictions on the transmitting power of D2D devices [4]. Moreover, D2D devices can use fixed relay stations [5] or idle users as relays to assist data transmission, and thus increase the data transmission rate, reduce the transmission power, and mitigate the interference, especially at poor channel conditions [6].…”

Power allocation and relay selection for energy efficient cooperation in wireless sensor networks with energy harvesting

“…Weikai Xu et al [15] have proposed a power splitting-based relaying and a time switchingbased relaying protocols to enable wireless information transferring and energy harvesting in a denoise and forward two-way relay network, they analyze the two proposed protocols and obtain the optimal results for power of sources, power splitting ratio, and time switching factor. Zhe Wang et al [16] have considered an energy harvesting relay station to improve the service quality of a cellular network. The goal is to assign each mobile station a relay station to minimize the probability of relay service outage.…”