A Blockchain-Based Node Selection Algorithm in Cognitive Wireless Networks

Abstract

In cognitive wireless networks, multi-node cooperative spectrum sensing can effectively improve the accuracy of spectrum sensing, but there is a non-linear relationship between the number of nodes and sensing accuracy. Nodes with low reliability participate in cooperative sensing, which is not conducive to the improvement of sensing accuracy, and reduces the energy efficiency of spectrum sensing, which poses challenges to the normal operation of cognitive wireless networks. In order to improve energy efficiency and sensing performance, this paper proposes the node evaluation and scheduling (NES) algorithm and the Secure Spectrum Sensing based on Blockchain (SSSB) algorithm, which can evaluate the reliability of sensing nodes in real time, and obtain the trust value of the node. The nodes information is stored in the management center of blockchain. Blockchain encrypts nodes information to ensure that a node corresponds to its own trust value without confusion. Fusion Center of cognitive wireless networks select good performance nodes to participate in cooperative spectrum sensing. Which can reduce energy consumption while improving the sensing performance. The simulation experiment results show that the new algorithm in this paper is far superior to the traditional algorithm. Under the same other conditions, the detection probability is increased by 5%, and the energy consumption is reduced by 10%, and the safety index has also been greatly improved.INDEX TERMS Cognitive wireless networks, blockchain, energy efficiency, sensing accuracy.

Blockchain based robust Cooperative spectrum sensing

“…Initially IDs of malicious users are not known as they are randomly taken. Here, in this paper, we consider the malicious users L = [2,4,5,7]. Improving the detection performance of our method involves identifying malicious users and their IDs and ignoring their datas.…”

“…The spectrum sensing was found to be accurate and secured by combatting SSDF attacks. In [2], [3] and [4], the initial trust value of the sensing node is obtained using an evaluation algorithm. The management center of blockchain stores the updated trust value and encrypts a node, node information and its trust value.…”

Collaborative Cognitive Wireless Network Optimization Model and Network Parameter Optimization Algorithm

“…Tangsen et al used a node evaluation and scheduling algorithm to evaluate the reliability of sensing nodes and used a blockchain-based secure spectrum sensing algorithm to obtain the node's trust value. Te new algorithm improved detection probability by 5% while using less energy [17]. Cao and Pan optimized the cooperative spectrum sensing strategy based on particle swarm-optimized cognitive wireless sensor networks.…”

Blockchain for Modern Applications: A Survey

“…A secure spectrum sensing technique based on blockchain is presented in [ 109 ] to increase the energy efficiency and sensing accuracy of cognitive wireless networks at the same time. The mechanism can adapt to changes in the environment and adjust the number of nodes engaging in cooperative sensing in real-time, as well as evaluate the dependability of sensing nodes in real-time and calculate the node’s trust value using an evaluation algorithm.…”