Decentralized Blockchain-Based Dynamic Spectrum Acquisition for Wireless Downlink Communications

Impact Factor:4.875

DOI number:10.1109/TSP.2021.3052830

Journal:IEEE Transactions on Signal Processing

Abstract:Wireless network virtualization is a promising solution to improve spectrum efficiency. For a wireless downlink communication system with multiple mobile virtual network operators (MVNOs), we propose a decentralized blockchain-based dynamic spectrum acquisition scheme. Our proposed scheme aims to minimize the sum transmit power at all MVNOs while satisfying the average data transmission rate thresholds. For each MVNO, the required wireless spectrum to provide customized services to the mobile users (MUs) is predicted using the half-range Gauss-Hermite quadrature. Based on the predicted values, all the MVNOs carry out a blockchain-based distributed alternative direction method of multipliers to obtain the global optimal solution to the aforementioned sum transmit power minimization problem. To examine the effectiveness of our proposed scheme, with known system parameters, we also theoretically derive the semi-closed-form solution to the actually required sum transmit power minimization problem subject to data transmission rate constraints. Simulation results illustrate that our proposed dynamic spectrum acquisition scheme achieves almost the same minimum sum power as the non-causal scheme, which assumes the number of active MUs in all cells and all the channels are known non-causally for the optimal dynamic spectrum allocation.

Co-author:Li Yiqing,zhangguangchi,秦家银

First Author:jmiao

Correspondence Author:张旗

Discipline:Engineering

First-Level Discipline:Information and Communication Engineering

Document Type:J

Volume:69

Page Number:986–997

ISSN No.:1941-0476

Translation or Not:no

Date of Publication:2021-01-22

Included Journals:SCI

Links to published journals:https://ieeexplore.ieee.org/document/9334436