论文标题
基于ARQ的平均共识与有导网络拓扑具有不可靠的通信链接
ARQ-based Average Consensus over Directed Network Topologies with Unreliable Communication Links
论文作者
论文摘要
在本文中,我们解决了牢固连接的有向图中的离散时间平均共识问题,在该图中,节点通过不可靠的易于错误的通信链接来交换信息。我们通过利用(混合)自动重复请求的(H)ARQ协议的特征来增强可鲁棒的比率共识算法 - 用于数据传输错误控制的ARQ协议,以允许节点达到渐近平均共识,即使在误差方向网络上交换信息时,也可以达到渐近平均共识。除了处理错误数据包的重传引起的时变信息延迟外,此策略还可以处理超过预定义的数据包重传限制时发生的数据包滴。调用(h)ARQ协议允许节点:(a)利用无误差确认反馈以最初获取或以后更新其外数,(b)知道数据包是否已到达,(c)确定重新启动限制施加的延迟范围的本地上限。通过增强网络相应的权重矩阵,我们表明,使用我们提出的(H)ARQ比率共识算法的节点可以与不可靠的网络达到渐近平均共识,同时提高其收敛速度并保持其本地缓冲区的低值,而不是当前的局部缓冲区。
In this paper, we address the discrete-time average consensus problem in strongly connected directed graphs, where nodes exchange information over unreliable error-prone communication links. We enhance the Robustified Ratio Consensus algorithm by exploiting features of the (Hybrid) Automatic Repeat ReQuest - (H)ARQ protocol used for error control of data transmissions, in order to allow the nodes to reach asymptotic average consensus even when information is exchanged over error-prone directional networks. This strategy, apart from handling time-varying information delays induced by retransmissions of erroneous packets, can also handle packet drops that occur when exceeding a predefined packet retransmission limit. Invoking the (H)ARQ protocol allows nodes to: (a) exploit the incoming error-free acknowledgement feedback to initially acquire or later update their out-degree, (b) know whether a packet has arrived or not, and (c) determine a local upper-bound on the delays imposed by the retransmission limit. By augmenting the network's corresponding weight matrix, we show that nodes utilizing our proposed (H)ARQ Ratio Consensus algorithm can reach asymptotic average consensus over unreliable networks, while improving their convergence speed and maintaining low values in their local buffers compared to the current state-of-the-art.