Recall-Based Dynamic Spectrum Auction with the Protection of Primary Users

Abstract

Dynamic spectrum auction is considered as an effective solution to improve spectrum utilization efficiency in dynamic spectrum sharing networks because it can provide an economic incentive to motivate primary users to share their idle spectrum with secondary users. However, the primary users' own quality of services (QoS) cannot be guaranteed in case of demand peak because their spectrum is being used by the winners at auction. To solve this problem, we propose a recall-based dynamic spectrum auction (RBDSA) algorithm with which a primary base station (PBS) can auction its unused channels to some secondary wireless services providers (SWSPs) safely and economically. The PBS' users are granted a higher channel access priority than the SWSPs, then the PBS can recall some channels after auction to satisfy its demand if necessary. To maximize its profit from spectrum auction and self services, the PBS will reduce its excessive or deficient channels reservation, which is enforced with an introduction of punishment item in the PBS' utility. We show analytically that both the PBS and the SWSPs in the RBDSA algorithm are truthful and there is a weakly dominant equilibrium. Moreover, it can be extended to the scenarios with multiple units of channels demand and multiple PBSs. Simulation results show that the RBDSA algorithm can increase the utility of the PBS and improve the channels utilization efficiency while keeping the QoS of the primary users.

Zero-forcing beamforming for physical layer security of energy harvesting wireless communications

“…Hence, the harvested energy at the EH receiver can be computed from Q = ζ |gs| 2 + |gw| 2 , where ζ is a constant that accounts for the efficiency in the energy conversion. Interestingly, the energy limit Q is very similar to the interference limit in cognitive radio (CR) [30][31][32][33][34], where the interference should be controlled to be below a predefined value.…”

Real-Time Pricing Strategy Based on the Stability of Smart Grid for Green Internet of Things

“…Internet of things (IoTs) has emerged as a new paradigm for the next generation to enable diverse objects to exchange and collect data with each other. Compared with the conventional paradigms, more considerations are given to develop the green IoTs where new energy efficient devices, protocols, and architectures have been designed to interconnect with the physical world [1][2][3][4]. Among the enabling green IoTs technologies, the smart grid [5,6] plays an important role in realizing the green IoTs [7][8][9][10].…”

Performance of an M-QAM full-duplex wireless system with a nonlinear amplifier

“…The radio spectrum has become one of the scarcest resources with the rapid development of wireless communication technologies [1,2]. Full-duplex wireless communications can simultaneously transmit and receive signals in the same band.…”