【Author】
Zhi, Hui; Ge, Hongjie; Wang, Yong
【Abstract】The cooperative communication of distributed terminals has many performance advantages and wide application prospects. However, it lacks effective trust foundation between distributed terminals and lacks data security guarantee. Block chain naturally has the properties of transparency, tamper-proof, and full traceability. It can effectively solve the trust problem between untrusted terminals and ensure data security. Thus, we introduce block chain into the cooperative communication of large number terminals, propose a cooperative communication method based on block chain, design a multi-chain structure to reduce resource consumption, and give the detailed working procedure of the cooperative communication method. In the working procedure, we propose a source-relay pairing and pricing scheme based on Kuhn-Munkres algorithm (SRPP-KM) to solve the optimal source relay pairing and transaction price, and design a lightweight consensus mechanism based on intra-region dynamic delegated Byzantine fault tolerant (DDBFT) and interactive updates between regional chain and main chain to reduce resource waste and achieve fast consensus. Analyses show that the proposed method can establish trust foundation between terminals and promote cooperation between terminals. Simulation results show that the proposed method can obtain higher sum revenue of sources while satisfying relays' expected revenue and achieve faster consensus when compared with other methods.
【Keywords】Relays; Blockchains; Cooperative communication; Throughput; Heuristic algorithms; Wireless networks; Pricing; Cooperative communication; large number of distributed terminals; block chain
【标题】面向大量分布式终端的基于区块链的协作通信方法
【摘要】分布式终端协同通信具有诸多性能优势和广阔的应用前景。但是，分布式终端之间缺乏有效的信任基础，缺乏数据安全保障。区块链天然具有透明、不可篡改、完全可追溯的特性。可以有效解决不可信终端之间的信任问题，保证数据安全。为此，我们将区块链引入到大量终端的协同通信中，提出了一种基于区块链的协同通信方法，设计了多链结构以减少资源消耗，并给出了协同通信方法的详细工作流程。在工作过程中，我们提出了一种基于 Kuhn-Munkres 算法（SRPP-KM）的源中继配对和定价方案来解决最优的源中继配对和交易价格，并设计了一种基于区域内动态委托的轻量级共识机制。拜占庭容错（DDBFT）和区域链与主链之间的交互更新，减少资源浪费，实现快速共识。分析表明，该方法可以建立终端之间的信任基础，促进终端之间的合作。仿真结果表明，与其他方法相比，该方法在满足中继预期收益的同时，可以获得更高的源总收益，并能更快地达成共识。
【关键词】继电器；区块链；合作沟通；吞吐量；启发式算法；无线网络;价钱;合作沟通；大量分布式终端；区块链
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