【Author】
Chen, Xi; Yang, Jian; Qiu, Junfei
【Source】WIRELESS COMMUNICATIONS & MOBILE COMPUTING
【Abstract】High frequency (HF) is an important method for long-range communications and even the only mean when satellites are destroyed or interfered, which play an essential role in defense and economic construction. However, noncooperative frequency competition accompanied with power competition results in the continuously deterioration of HF electromagnetic environment. This article endeavors to resolve this issue through proposing blockchain-empowered HF spectrum management. Specifically, massive personal HF devices are organized around the preselected nodes to construct HF spectrum management IoT, further monitor, and share HF data through PBFT (Practical Byzantine Fault Tolerance) protocol. To address the scalability problem during the consensus, a multilayer PBFT consensus protocol is employed. Scalability evaluations show that increasing consensus layers of PBFT greatly reduces the communication complexity. Security assessments illustrate that the security performance will decline with the increase of layers. Tradeoff has been made between the communication complexity and security performance, indicating 2-4 layers PBFT is sufficient, which bring down the communication complexity and also achieve acceptable security performance.
【标题】区块链赋能的高频频谱管理物联网：多层 PBFT 共识视角
【摘要】高频（HF）是远程通信的重要手段，甚至是卫星被毁坏或干扰的唯一手段，在国防和经济建设中发挥着至关重要的作用。然而，伴随功率竞争的非合作频率竞争导致高频电磁环境不断恶化。本文试图通过提出区块链授权的 HF 频谱管理来解决这个问题。具体而言，围绕预选节点组织海量个人高频设备，构建高频频谱管理物联网，通过PBFT（Practical Byzantine Fault Tolerance）协议进一步监控和共享高频数据。为了解决共识期间的可扩展性问题，采用了多层 PBFT 共识协议。可扩展性评估表明，增加 PBFT 的共识层大大降低了通信复杂性。安全评估表明，随着层数的增加，安全性能会下降。在通信复杂度和安全性能之间进行了权衡，表明2-4层PBFT就足够了，这降低了通信复杂度，同时也达到了可接受的安全性能。
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