3 research outputs found
Blockchain-Based Approach for Securing Spectrum Trading in Multibeam Satellite Systems
This paper presents a blockchain-based approach for securing spectrum sharing
in multi-beam satellite systems. Satellite spectrum is a scarce resource that
requires highly efficient management schemes for optimized sharing by network
users. However, spectrum sharing is vulnerable to attacks by malicious protocol
participants. In order to ensure efficient spectrum management in the face of
dishonest satellite users or cyber attackers, it is important for spectrum
sharing mechanism to provide transparency and traceability of the trading
process so as to enable the system to detect, and hence eliminate, unauthorized
access by malicious users. We address these requirements by proposing the use
of blockchain which, apart from its ability to provide transparency and
traceability, ensures an immutable means for keeping track of user trading
reputation. Besides, in order to address the practical constraints of
heterogeneous user nodes, we also propose the use of edge computing to support
users with limited computing power. In this paper, we propose a
blockchain-based spectrum trading framework and, based on which, a multibeam
satellite spectrum sharing algorithm for interference pricing and heterogeneous
spectrum demands is devised to improve the efficiency of satellite spectrum. By
leveraging on the system characteristics of blockchain, a dynamic spectrum
sharing mechanism with traceability, openness and transparency for whole
trading process is presented. Numerical results are also provided to evaluate
the system benefits and spectrum pricing of the proposed mechanism
Blockchains for Spectrum Management in Wireless Networks: A Survey
Regulatory radio spectrum management is evolving from traditional static
frequency allocation and assignment schemes towards dynamic spectrum management
and access schemes. This evolution is necessitated by a number of factors
including underutilization of licensed spectrum bands, changing market and
technological developments and increased demand for spectrum for emerging
applications in multimedia communications, internet-of-things and fifth
generation (5G) wireless networks. In simple terms dynamic spectrum management
involves allowing unlicensed users known as secondary users (SUs) to access the
licensed spectrum of a licensed user also known as primary user (PU). This is
primarily achieved using spectrum sharing schemes that leverage spectrum
database and cognitive radio techniques. However, the use of spectrum database
and cognitive radio techniques faces reliability, security and privacy concerns
for spectrum sharing. There is also a need to support other requirements of
dynamic spectrum management such as secondary spectrum trading market and
dynamic spectrum access coordination. In this work, we review the use of
blockchains for enabling spectrum sharing and other aspects of dynamic spectrum
management. The review covers the use of blockchain to record spectrum
management information such as spectrum sensing results and spectrum auction
transactions in a secure manner. The article also covers the use of smart
contracts to support complex service-levelagreements (SLAs) between network
operators which is key to supporting a self-organized secondary spectrum
sharing market and enforcement of regulatory policies. A taxonomy of the
intersection between blockchain and various concepts of dynamic spectrum
management is also provide
A Trust-Centric Privacy-Preserving Blockchain for Dynamic Spectrum Management in IoT Networks
In this paper, we propose a trust-centric privacy-preserving blockchain for
dynamic spectrum access in IoT networks. To be specific, we propose a trust
evaluation mechanism to evaluate the trustworthiness of sensing nodes and
design a Proof-of-Trust (PoT) consensus mechanism to build a scalable
blockchain with high transaction-per-second (TPS). Moreover, a privacy
protection scheme is proposed to protect sensors' real-time geolocatioin
information when they upload sensing data to the blockchain. Two smart
contracts are designed to make the whole procedure (spectrum sensing, spectrum
auction, and spectrum allocation) run automatically. Simulation results
demonstrate the expected computation cost of the PoT consensus algorithm for
reliable sensing nodes is low, and the cooperative sensing performance is
improved with the help of trust value evaluation mechanism.In addition,
incentivization and security are also analyzed, which show that our design not
only can encourage nodes' participation, but also resist to many kinds of
attacks which are frequently encountered in trust-based blockchain systems.Comment: 15pages, 15 figure