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    • 8. 发明授权
    • System for intelligent delegation of irrigation control
    • 智能授权灌溉控制系统
    • US08326440B2
    • 2012-12-04
    • US12391171
    • 2009-02-23
    • Jacob Christen Christfort
    • Jacob Christen Christfort
    • G05B9/03
    • G05B19/0428G05B2219/24199G05B2219/2625
    • A node of a fault-tolerant system relies upon a primary communication mechanism, when possible, for primary connection to a central server. The node monitors its primary connection to the server. While the primary connection is active, the node operates in a supervised mode, in that it generally does not perform a certain subset of tasks without having received real-time commands from the server to perform those tasks. However, when the node detects that it is no longer connected to the server, the node transitions into a fail-over mode. The node operates in the fail-over mode until the node detects that primary connection is re-established. While in fail-over mode, the node may execute a stored set of fail-over instructions that were provided by the server. The node may also attempt to establish a backup connection to the server via a second and different type of communication mechanism.
    • 容错系统的节点在可能的情况下依赖于主要通信机制,用于主中央服务器的连接。 节点监视其与服务器的主连接。 当主连接处于活动状态时,节点以受监督模式工作,因为它通常不执行某个任务子集,而没有从服务器接收到实时命令来执行这些任务。 但是,当节点检测到它不再连接到服务器时,节点转换为故障切换模式。 节点以故障切换模式运行,直到节点检测到重新建立主连接。 在故障切换模式下,节点可以执行由服务器提供的存储的故障转移指令集。 节点还可以尝试通过第二种不同类型的通信机制建立到服务器的备份连接。