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    • 24. 发明授权
    • Method and apparatus for increasing survivability in IP networks
    • 提高IP网络生存能力的方法和装置
    • US07680055B1
    • 2010-03-16
    • US10805643
    • 2004-03-19
    • Kadangode K. RamakrishnanMukul Goyal
    • Kadangode K. RamakrishnanMukul Goyal
    • H04J1/16
    • H04L41/0896H04L41/12
    • A method and apparatus for increasing the capability of a network topology model having a plurality of nodes connected by existing links to maintain service continuity in the presence of faults. The steps of the method include adding new links to the network topology model to protect against single node failures, and adjusting link weights for the network topology model to reduce at least one of a cost of network operation and an imbalance in link utilizations. Preferably, the link weights are adjusted to reduce the imbalance in link utilizations without deteriorating the cost of network operation. The link weights are preferably adjusted to reduce the cost of network operation without increasing the imbalance in link utilizations. Preferably, the link weights are adjusted to reduce the cost of network operation without increasing the imbalance in link utilizations while keeping the utilization for each link below a specific threshold. In addition, links can be added to the network topology model to reduce the cost of network operation.
    • 一种用于增加具有由现有链路连接的多个节点的网络拓扑模型的能力的方法和装置,以在存在故障的情况下维持业务连续性。 该方法的步骤包括向网络拓扑模型添加新的链路以防止单个节点故障,以及调整网络拓扑模型的链路权重以减少网络操作的成本和链路利用率的不平衡中的至少一个。 优选地,链路权重被调整以减少链路利用率的不平衡,而不会降低网络操作的成本。 优选地调整链路权重以减少网络操作的成本,而不增加链路利用率的不平衡。 优选地,调整链路权重以降低网络操作的成本,而不增加链路利用率的不平衡,同时保持每个链路的利用率低于特定阈值。 另外,链路可以添加到网络拓扑模型中,以降低网络运行的成本。
    • 30. 发明授权
    • Arbitration system based on requester class and relative priority including transmit descriptor valid bit for a shared resource having multiple requesters
    • 基于请求者类和相对优先级的仲裁系统,包括具有多个请求者的共享资源的发送描述符有效位
    • US06199124B1
    • 2001-03-06
    • US09206200
    • 1998-12-04
    • Kadangode K. RamakrishnanMichael Ben-NunPeter John Roman
    • Kadangode K. RamakrishnanMichael Ben-NunPeter John Roman
    • G06F300
    • G06F13/364G06F13/36
    • In accordance with principles of the invention, there is provided an arbitration system for multiple requesters of a shared data transfer resource, such as a system bus or a peripheral bus. The disclosed system arbitrates among multiple classes of requesters which are divided into multiple levels of a request hierarchy. In the example embodiment, the multiple requesters include logic for processing received data from the network, logic for processing data to be transmitted onto the network, logic for moving transmit and receive descriptors between the host memory and the adapter, logic for reporting status from the adapter to the host, and logic for generating an error and maintenance status update from the adapter to the host. The new system ensures fairness between transmit and receive processes, that FIFOs associated with transmit queues are not underrun, and further than notification of non-error and maintenance status changes are processed with minimal latency.
    • 根据本发明的原理,提供了一种用于共享数据传输资源(诸如系统总线或外围总线)的多个请求者的仲裁系统。 所公开的系统在分类​​为请求层次的多个级别的多个请求者类中进行仲裁。 在示例实施例中,多个请求者包括用于处理来自网络的接收数据的逻辑,用于处理要发送到网络上的数据的逻辑,用于在主机存储器和适配器之间移动发送和接收描述符的逻辑,用于从主机存储器和适配器报告状态的逻辑 适配器到主机,以及用于生成从适配器到主机的错误和维护状态更新的逻辑。 新系统确保发送和接收过程之间的公平性,与发送队列相关联的FIFO不会欠载,并且以更短的延迟处理非错误和维护状态更改的通知。