Abstract
The consensus protocol is the foundation of all blockchain systems. Existing consensus protocols like Proof-of-Work (PoW) consume a vast amount of energy. However, they are severely limited to transaction throughput. Consensus protocols like Proof-of-Stake (PoS) have been proposed to address this challenge. However, these protocols have compromised the fairness by discouraging the “poorer” participants and allowing “richest” stakeholders to have full control over the generation of blocks. Towards meeting these conflicting requirements on throughput and fairness, we propose a blockchain consensus protocol based on the Quality-of-Service (QoS). In our Proof-of-QoS (PoQ) protocol, the entire network is divided into small regions. Each region nominates a node based on its QoS. A deterministic Byzantine Fault Tolerance (BFT) consensus is then run among all nominated nodes. PoQ aims to achieve a very high transaction throughput as a permissionless protocol and provides a fairer environment for participants. Our experimental results show that PoQ can achieve 9.7K transactions per second (TPS) for a network of 12 regions.
| Original language | English |
|---|---|
| Article number | 101580 |
| Number of pages | 13 |
| Journal | Computers & Security |
| Volume | 87 |
| DOIs | |
| Publication status | Published - Nov 2019 |
Keywords
- BFT
- Blockchain
- Consensus protocol
- Proof-of-QoS (PoQ)
- Quality of service
Cite this
}
Proof-of-QoS : QoS based blockchain consensus protocol. / Yu, Bin; Liu, Joseph; Nepal, Surya; Yu, Jiangshan; Rimba, Paul.
In: Computers & Security, Vol. 87, 101580, 11.2019.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Proof-of-QoS
T2 - QoS based blockchain consensus protocol
AU - Yu, Bin
AU - Liu, Joseph
AU - Nepal, Surya
AU - Yu, Jiangshan
AU - Rimba, Paul
PY - 2019/11
Y1 - 2019/11
N2 - The consensus protocol is the foundation of all blockchain systems. Existing consensus protocols like Proof-of-Work (PoW) consume a vast amount of energy. However, they are severely limited to transaction throughput. Consensus protocols like Proof-of-Stake (PoS) have been proposed to address this challenge. However, these protocols have compromised the fairness by discouraging the “poorer” participants and allowing “richest” stakeholders to have full control over the generation of blocks. Towards meeting these conflicting requirements on throughput and fairness, we propose a blockchain consensus protocol based on the Quality-of-Service (QoS). In our Proof-of-QoS (PoQ) protocol, the entire network is divided into small regions. Each region nominates a node based on its QoS. A deterministic Byzantine Fault Tolerance (BFT) consensus is then run among all nominated nodes. PoQ aims to achieve a very high transaction throughput as a permissionless protocol and provides a fairer environment for participants. Our experimental results show that PoQ can achieve 9.7K transactions per second (TPS) for a network of 12 regions.
AB - The consensus protocol is the foundation of all blockchain systems. Existing consensus protocols like Proof-of-Work (PoW) consume a vast amount of energy. However, they are severely limited to transaction throughput. Consensus protocols like Proof-of-Stake (PoS) have been proposed to address this challenge. However, these protocols have compromised the fairness by discouraging the “poorer” participants and allowing “richest” stakeholders to have full control over the generation of blocks. Towards meeting these conflicting requirements on throughput and fairness, we propose a blockchain consensus protocol based on the Quality-of-Service (QoS). In our Proof-of-QoS (PoQ) protocol, the entire network is divided into small regions. Each region nominates a node based on its QoS. A deterministic Byzantine Fault Tolerance (BFT) consensus is then run among all nominated nodes. PoQ aims to achieve a very high transaction throughput as a permissionless protocol and provides a fairer environment for participants. Our experimental results show that PoQ can achieve 9.7K transactions per second (TPS) for a network of 12 regions.
KW - BFT
KW - Blockchain
KW - Consensus protocol
KW - Proof-of-QoS (PoQ)
KW - Quality of service
UR - http://www.scopus.com/inward/record.url?scp=85070279759&partnerID=8YFLogxK
U2 - 10.1016/j.cose.2019.101580
DO - 10.1016/j.cose.2019.101580
M3 - Article
VL - 87
JO - Computers & Security
JF - Computers & Security
SN - 0167-4048
M1 - 101580
ER -