TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Antwi, Robert
A1  - Gadze, James Dzisi
A1  - Tchao, Eric Tutu
A1  - Sikora, Axel
A1  - Nunoo-Mensah, Henry
A1  - Welte, Dominik
A1  - Agbemenu, Andrew Selasi
A1  - Obour Agyekum, Kwame Opunie-Boachie
A1  - Agyemang, Justice Owusu
A1  - Keelson, Eliel
ED  - Chen, Shiping
ED  - Ding, Kaimeng
ED  - Zhang, Yanmei
T1  - A Survey on Network Optimization Techniques for Blockchain Systems
JF  - Algorithms
N2  - The increase of the Internet of Things (IoT) calls for secure solutions for industrial applications. The security of IoT can be potentially improved by blockchain. However, blockchain technology suffers scalability issues which hinders integration with IoT. Solutions to blockchain’s scalability issues, such as minimizing the computational complexity of consensus algorithms or blockchain storage requirements, have received attention. However, to realize the full potential of blockchain in IoT, the inefficiencies of its inter-peer communication must also be addressed. For example, blockchain uses a flooding technique to share blocks, resulting in duplicates and inefficient bandwidth usage. Moreover, blockchain peers use a random neighbor selection (RNS) technique to decide on other peers with whom to exchange blockchain data. As a result, the peer-to-peer (P2P) topology formation limits the effective achievable throughput. This paper provides a survey on the state-of-the-art network structures and communication mechanisms used in blockchain and establishes the need for network-based optimization. Additionally, it discusses the blockchain architecture and its layers categorizes existing literature into the layers and provides a survey on the state-of-the-art optimization frameworks, analyzing their effectiveness and ability to scale. Finally, this paper presents recommendations for future work.
KW  - blockchain
KW  - IIoT
KW  - Industrial internet of things
KW  - network optimization
KW  - peer-to-peer
KW  - topology
KW  - gossip protocol
Y1  - 2022
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:ofb1-opus4-58319
SN  - 1999-4893
SS  - 1999-4893
U6  - https://doi.org/10.3390/a15060193
DO  - https://doi.org/10.3390/a15060193
VL  - 15
IS  - 6
SP  - 1
EP  - 22
PB  - MDPI
CY  - Basel
ER  -