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    • 2. 发明授权
    • Network fault detection and recovery
    • 网络故障检测和恢复
    • US06581166B1
    • 2003-06-17
    • US09516526
    • 2000-03-01
    • Michael HirstDouglas MacDougall
    • Michael HirstDouglas MacDougall
    • H02H305
    • H04L69/08H04L69/40
    • A method of fault detection and recovery utilizes dual independent networks to provide fault-tolerance. These networks, a primary and alternate network, are utilized such that communications for a particular computer take place via that computer's preferred network by default. Faults are detected through the use of a heartbeat pinging mechanism to detect faults on the network itself and by periodic port integrity checks to detect port faults. The integrity of the non-default network and port are also periodically verified to assure effective fault recovery. Upon detection of a fault, a packet routing table in the detecting computer is altered to set the detecting computer's default network to the previously non-default network. Additionally, a new gateway packet is transmitted which allows other network computers to modify their routing tables to communicate with the detecting computer over its current default network.
    • 一种故障检测和恢复方法利用双独立网络来提供容错能力。 这些网络是主要和替代网络,因此默认情况下通过该计算机的首选网络进行特定计算机的通信。 通过使用心跳ping机制来检测故障,以检测网络本身的故障,并通过定期的端口完整性检查来检测端口故障。 还定期验证非默认网络和端口的完整性,以确保有效的故障恢复。在检测到故障时,更改检测计算机中的数据包路由表,将检测计算机的默认网络设置为以前的非默认网络 。 另外,发送新的网关分组,其允许其他网络计算机修改其路由表以通过其当前的默认网络与检测计算机进行通信。
    • 3. 发明申请
    • Block-oriented control system on high speed ethernet
    • 高速以太网面向块控制系统
    • US20050240287A1
    • 2005-10-27
    • US10874567
    • 2004-06-22
    • David GlanzerColin CorlesSteven BrodmanWilliam HawkinsMichael HirstTony KozlikLee NeitzelRaymond SawyerJohan Tegnell
    • David GlanzerColin CorlesSteven BrodmanWilliam HawkinsMichael HirstTony KozlikLee NeitzelRaymond SawyerJohan Tegnell
    • G05B9/03G05B11/01G05B15/00G05B15/02G05B19/418G05B23/02G06F15/173H04L12/24H04L12/46
    • G05B9/03G05B15/02G05B19/4185G05B2219/31118H04L12/4616H04L12/462H04L41/06Y02P90/18Y02P90/185
    • A distributed control system architecture (HSE) provides an open, interoperable solution optimized for integration of distributed control systems and other control devices in a high performance backbone, provides an open, interoperable solution that provides system time synchronization suitable for distributed control applications operable over a high performance backbone, and provides an open, interoperable solution that provides a fault tolerant high performance backbone as well as fault tolerant devices that are connected to the backbone. The distributed control system architecture comprises a High speed Ethernet Field Device Access (HSE FDA) Agent, which maps services of a distributed control system, e.g., a fieldbus System, to and from a standard, commercial off-the-shelf (COTS) Ethernet/Internet component. The distributed control system architecture also comprises a High speed Ethernet System Management Kernel (HSE SMK) that operates to keep a local time, and keeps the difference between the local time and a system time provided by a time server within a value specified by the time sync class. The local time is used to time stamp events so that event messages from devices may be correlated across the system. The distributed control system architecture further comprises a High speed Ethernet Local Area Network Redundancy Entity (HSE LRE) that provides redundancy transparent to the applications running on the system. The HSE LRE of each device periodically transmits a diagnostic message representing its view of the network to the other Devices on the system. Each device uses the diagnostic messages to maintain a Network Status Table (NST), which is used for fault detection and selection from a redundant pair of resources.
    • 分布式控制系统架构(HSE)提供了一个开放的,可互操作的解决方案,该解决方案针对高性能骨干网上的分布式控制系统和其他控制设备的集成进行了优化,提供了一种开放的,可互操作的解决方案,可提供系统时间同步,适用于可在 高性能骨干网,并提供开放,可互操作的解决方案,提供容错的高性能骨干网以及连接到骨干网的容错设备。 分布式控制系统架构包括高速以太网现场设备接入(HSE FDA)代理,其将分布式控制系统(例如现场总线系统)的服务映射到标准的商用现货(COTS)以太网 / Internet组件。 分布式控制系统架构还包括高速以太网系统管理内核(HSE SMK),其操作以保持本地时间,并且将时间服务器提供的本地时间和系统时间之间的差异保持在时间指定的值内 同步类 本地时间用于时间戳事件,以便来自设备的事件消息可能会跨系统关联。 分布式控制系统体系结构还包括高速以太网局域网冗余实体(HSE LRE),其为在系统上运行的应用提供透明的冗余。 每个设备的HSE LRE周期性地将表示其网络视图的诊断消息发送到系统上的其他设备。 每个设备使用诊断消息来维护网络状态表(NST),用于从冗余对资源中进行故障检测和选择。