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    Method for flow controlling ATM traffic
    4.
    发明授权
    Method for flow controlling ATM traffic 失效
    流量控制ATM流量的方法

    公开(公告)号：US06249819B1

    公开(公告)日：2001-06-19

    申请号：US08985048

    申请日：1997-12-04

    申请人： Douglas H. Hunt ,  Raj Krishnan Nair

    发明人： Douglas H. Hunt ,  Raj Krishnan Nair

    IPC分类号： G06F1516

    CPC分类号： H04L12/5602 ,  H04L2012/5631 ,  H04L2012/5634 ,  H04L2012/5647 ,  H04Q11/0478

    摘要： Permission based flow control is implemented in a computer network having at least a downstream, intermediate and upstream network device by receiving credits at the intermediate network device from the downstream network device and granting credits from the intermediate network device to the upstream network device based at least in part upon the credits received at the intermediate network device from the downstream network device. Credit chaining as described above is employed to permit the granting of the right to transmit downstream to be predicated upon buffer availability downstream of the next downstream network device. Via the use of credit chaining, high utilization of network resources is achieved with minimal loss of data traffic.

    摘要翻译： 基于权限的流量控制在具有至少下游，中间和上游网络设备的计算机网络中通过从中间网络设备从下游网络设备接收信用并且至少从中间网络设备向上游网络设备授予信用来实现 部分地基于从中间网络设备从下游网络设备接收的信用。 采用如上所述的信用链来允许授权发送下游的权利，以便在下一个下游网络设备的下游的缓冲器可用性的基础上。 通过使用信用链接，实现网络资源的高利用率，数据流量的损失最小。

    Method and apparatus for enabling flow control over multiple networks having disparate flow control capability
    5.
    发明授权
    Method and apparatus for enabling flow control over multiple networks having disparate flow control capability 失效
    用于实现具有不同流量控制能力的多个网络上的流量控制的方法和装置

    公开(公告)号：US6151300A

    公开(公告)日：2000-11-21

    申请号：US854231

    申请日：1997-05-09

    申请人： Douglas H. Hunt ,  Raj Krishnan Nair ,  Andrew G. Malis

    发明人： Douglas H. Hunt ,  Raj Krishnan Nair ,  Andrew G. Malis

    IPC分类号： H04L12/46 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08 ,  G01R31/08 ,  G06F11/00 ,  G08C15/00

    CPC分类号： H04L12/5601 ,  H04L12/4608 ,  H04L12/5602 ,  H04L29/06 ,  H04L47/10 ,  H04L47/16 ,  H04L47/193 ,  H04L2012/5619 ,  H04L2012/5632 ,  H04L2012/5635 ,  H04L2012/5636 ,  H04L2012/5667 ,  H04L69/32

    摘要： Method and apparatus for extending lower-layer flow control end-to-end, transparent to network host systems, between network hosts attached to legacy networks without requiring any changes to the host networks or hosts themselves. In a first embodiment, a source host and a destination host, each residing on a respective LAN, communicate via an intermediate network supporting the lower-layer flow control. A higher-layer, end-to-end flow control protocol exists between the hosts. The lower-layer flow control protocol accounts for loss of bandwidth between each hop within the intermediate network. To extend the lower-layer flow control protocol to the hosts, an intelligent edge device of the intermediate network adjusts observed higher-layer flow control parameters based upon the state of the lower-layer flow control. No modifications to the legacy network or hosts is required, and the extension of flow control is transparent to the legacy networks.

    摘要翻译： 用于在连接到传统网络的网络主机之间，在不需要对主机网络或主机本身进行任何改变的情况下，端到端扩展下层流量控制的方法和装置，对网络主机系统是透明的。 在第一实施例中，每个驻留在相应LAN上的源主机和目的主机经由支持下层流控制的中间网络进行通信。 主机之间存在更高层次的端到端流控制协议。 下层流量控制协议考虑了中间网络中每个跳跃之间的带宽损失。 为了将下层流量控制协议扩展到主机，中间网络的智能边缘设备基于下层流量控制的状态来调整观察到的较高层流控制参数。 不需要对传统网络或主机进行任何修改，流量控制的扩展对于传统网络是透明的。

    Transmitter controlled flow control for buffer allocation in wide area ATM networks
    6.
    发明授权
    Transmitter controlled flow control for buffer allocation in wide area ATM networks 失效
    发射机控制流量控制用于广域ATM网络中的缓冲区分配

    公开(公告)号：US5898671A

    公开(公告)日：1999-04-27

    申请号：US714793

    申请日：1996-09-13

    申请人： Douglas H. Hunt ,  Raj Krishnan Nair

    发明人： Douglas H. Hunt ,  Raj Krishnan Nair

    IPC分类号： H04Q3/00 ,  H04J3/24 ,  H04L12/54 ,  H04L12/70

    CPC分类号： H04L12/5602 ,  H04J3/247 ,  H04L2012/5619 ,  H04L2012/5636

    摘要： A flow control technique for wide area ATM networks is disclosed in which allocation of buffers in a receiver switch is controlled by a transmitter switch. The receiver switch periodically transmits feedback messages to the transmitter switch indicatative of the state of fullness of the receiver switch buffers. The transmitter switch calculates updated receiver buffer fullness based upon the feedback message and the number of cells transmitted from the transmitter switch to the receiver switch since the feedback message was sent. Transmission of cells from the transmitter switch to the receiver switch is then controlled in accordance with an allocation technique, thereby allocating buffers in the receiving switch. The technique may be a roll-off technique in which the number of buffers available to each flow in the transmitter switch is reduced geometrically as the updated receiver buffer state is calculated to be more full. The flow control technique may be applied on either a per link or a per flow basis.

    摘要翻译： 公开了一种用于广域ATM网络的流量控制技术，其中接收器开关中的缓冲器的分配由发射机开关控制。 接收器开关周期性地将反馈消息发送到指示接收器开关缓冲器充满状态的发射器开关。 发送器开关根据反馈消息和从发送器开关发送到接收器开关的单元数量，计算更新的接收器缓冲器充满度，因为发送了反馈消息。 然后根据分配技术来控制从发射机交换机到接收机交换机的小区的传输，从而在接收交换机中分配缓冲区。 该技术可以是一种滚降技术，其中当更新的接收器缓冲器状态被计算为更加满时，在发射器开关中的每个流可用的缓冲器的数量几何地减小。 流控制技术可以以每个链路或每个流为基础应用。

    Supporting multiple application traffic types over connection oriented networks
    7.
    发明授权
    Supporting multiple application traffic types over connection oriented networks 失效
    通过面向连接的网络支持多种应用流量类型

    公开(公告)号：US06430154B1

    公开(公告)日：2002-08-06

    申请号：US09636479

    申请日：2000-08-10

    申请人： Douglas H. Hunt ,  Bruce S. Northcote

    发明人： Douglas H. Hunt ,  Bruce S. Northcote

    IPC分类号： H04L1226

    CPC分类号： H04L69/168 ,  H04L47/10 ,  H04L47/2416 ,  H04L47/2433 ,  H04L47/2441 ,  H04L47/245 ,  H04L47/50 ,  H04L47/521 ,  H04L47/60 ,  H04L47/621 ,  H04L47/6225 ,  H04L47/623 ,  H04L67/1002 ,  H04L69/16 ,  H04L69/18 ,  H04L2012/561 ,  H04L2012/5651 ,  H04L2012/5679 ,  H04Q11/0478

    摘要： A system and a method are disclosed for supporting multiple application traffic types over connection oriented networks. Data is received from multiple applications, for example in the form of data units, and is associated with a traffic type. The traffic type associated with a data unit indicates whether the data unit is inelastic traffic or elastic traffic. Data associated with inelastic traffic is mapped to at least one connection of a first connection type which provides for some amount of committed bandwidth, and limits on delay variation. Data associated with elastic traffic is mapped to at least one connection of a second connection type, which does not provide any committed bandwidth. Connections of the second connection type may ensure that elastic traffic data units that are accepted for transfer by the underlying network are delivered without loss due to network congestion, for example, by use of a flow control technique. A hierarchical scheduler may be employed to schedule transmissions of data units across connections organized into virtual trunks. The hierarchical scheduler may be used to ensure a high multiplexing gain with respect to connections within a single virtual trunk, as well as across multiple virtual trunks.

    摘要翻译： 公开了一种用于通过面向连接的网络支持多个应用业务类型的系统和方法。 从多个应用程序接收数据，例如数据单元的形式，并与流量类型相关联。 与数据单元相关联的流量类型指示数据单元是否是非弹性流量或弹性流量。 与非弹性业务相关联的数据被映射到提供一定量的承诺带宽的第一连接类型和延迟变化限制的至少一个连接。 与弹性流量相关联的数据被映射到不提供任何承诺带宽的第二连接类型的至少一个连接。 第二连接类型的连接可以确保，例如通过使用流控制技术，被基础网络接受传输的弹性业务数据单元由于网络拥塞而不丢失地被传送。 可以采用分级调度器来调度跨组织到虚拟干线中的连接的数据单元的传输。 分级调度器可以用于确保相对于单个虚拟中继线内的连接以及多个虚拟中继线的高复用增益。

    Reliable and flexible multicast mechanism for ATM networks
    8.
    发明授权
    Reliable and flexible multicast mechanism for ATM networks 失效
    ATM网络可靠灵活的组播机制

    公开(公告)号：US5991298A

    公开(公告)日：1999-11-23

    申请号：US781435

    申请日：1997-01-10

    申请人： Douglas H. Hunt ,  Raj Krishnan Nair

    发明人： Douglas H. Hunt ,  Raj Krishnan Nair

    IPC分类号： H04L12/18 ,  H04L12/70 ,  H04Q11/04 ,  H04L12/28 ,  H04L12/56

    CPC分类号： H04Q11/0478 ,  H04L2012/5619 ,  H04L2012/5642

    摘要： A method is disclosed for facilitating multicast operation in a network in which a data unit is multicast from a root node to a plurality of leaves via a plurality of branching point nodes in response to feedback processed at each branching point node. At least one cell forwarding technique is selected from a plurality of cell forwarding techniques at the respective branching point nodes. The cell forwarding techniques facilitate multicast operation by controlling forwarding and discard of multicast cells. The forwarding techniques are realized via use of a buffer ring in which cells are stored prior to forwarding. Manipulating head and tail pointers associated with the buffer ring allows for a plurality of desirable forwarding techniques.

    摘要翻译： 公开了一种方法，用于响应于在每个分支点节点处处理的反馈，在网络中促进多播操作，其中数据单元经由多个分支点节点从根节点多播到多个叶。 从相应分支点节点处的多个小区转发技术中选择至少一个小区转发技术。 小区转发技术通过控制组播小区的转发和丢弃来促进组播操作。 转发技术通过使用缓冲环来实现，其中在转发之前存储单元。 与缓冲环相关联的操纵头和尾指针允许多种期望的转发技术。