公开(公告)号：US5563875A

公开(公告)日：1996-10-08

申请号：US500674

申请日：1995-07-10

申请人： Timothy R. Hefel ,  Lap T. Huynh ,  Thomas P. McSweeney

发明人： Timothy R. Hefel ,  Lap T. Huynh ,  Thomas P. McSweeney

IPC分类号： H04L12/26 ,  H04L12/56 ,  H04J3/14

CPC分类号： H04L43/50 ,  H04L12/2697 ,  H04L45/123 ,  H04L45/00

摘要： A packet communications network includes a route testing system which launches a plurality of route testing messages from the source node to each of the nodes along the route, including the destination node, and returning to the source node. Time stamps in each of theses testing messages are compared to reception times to determine round trip delays which can be halved and compared to determine link transit times. These link transit times can, in turn, be analyzed to localize congestion or identify failed resources. The source resource is where the data is accumulated for the entire path and then analyzed to determine the location of failed links, if any, the response time from the source to the destination, the response time of each resource in the path, and the location of congested links. Packet switched resources identify the path test command themselves and carry out the testing procedure. Circuit switched resources utilize the control point controlling that resource to carry out the testing procedure.

摘要翻译： 分组通信网络包括：路由测试系统，其从源节点向包括目的地节点的路由的每个节点启动多个路由测试消息，并返回到源节点。 将每个测试消息中的时间戳与接收时间进行比较，以确定往返延迟，其可以减半并进行比较以确定链路传输时间。 反过来，可以分析这些链路传输时间以本地化拥塞或识别出现故障的资源。 源资源是整个路径数据的累积位置，然后进行分析，以确定故障链路的位置（如果有的话），从源到目标的响应时间，路径中每个资源的响应时间以及位置 拥挤的环节。 分组交换资源本身标识路径测试命令并执行测试过程。 电路交换资源利用控制该资源的控制点来执行测试程序。

公开(公告)号：US5235597A

公开(公告)日：1993-08-10

申请号：US667618

申请日：1991-03-08

申请人： Harold A. Himwich ,  Joseph R. Mason ,  Thomas P. McSweeney ,  Robert A. Vrabel ,  Loretta S. Wolhar

发明人： Harold A. Himwich ,  Joseph R. Mason ,  Thomas P. McSweeney ,  Robert A. Vrabel ,  Loretta S. Wolhar

IPC分类号： G06F13/00 ,  H04L29/06 ,  H04L29/10

CPC分类号： H04L29/06

摘要： A method and apparatus for allowing the higher layers of two nodes on a connection that uses an asynchronous link protocol to synchronize the exchange of messages so that, without knowledge of the lower data link protocols, the protocols at higher layers can complete when the data link protocols are also complete. The upper layer of a node sends messages for transmittal to another node to the lower layer of its node and receives messages from another node via the lower layer of its node. A first message, including an initiator flag is sent from the upper layer of the first node to the lower layer of the first node. In response, the lower layer transmits a second message including the initiator flag from the first message to the lower layer of the second node. The second message is transmitted as a command or a response in accordance with the send process state of the lower layer of the first node. If the upper layer of the first node subsequently detects a fourth message from the lower layer of the first node (which corresponds to a third message from the second node) and if the initiator flag is ON in the fourth message, the primary or secondary status of the first node is determined. If the first node is primary, the first message is resent to the lower layer of the first node until a message is received having the initiator flag set to OFF. The initiator flag is set to ON in all subsequent messages to the lower layer of the first node related to the first message. If the first node is secondary, the fourth message is discarded and the initiator flag in all subsequent messages to the lower layer of the first node related to the first message are set to OFF.

公开(公告)号：US07843961B2

公开(公告)日：2010-11-30

申请号：US11188440

申请日：2005-07-25

申请人： Jerry W. Stevens ,  Joel A. Fowler ,  Thomas P. McSweeney ,  Mooheng Zee

发明人： Jerry W. Stevens ,  Joel A. Fowler ,  Thomas P. McSweeney ,  Mooheng Zee

IPC分类号： H04J3/22 ,  H04L12/56 ,  G06F13/00 ,  G06F3/00

CPC分类号： G06F13/105 ,  H04L29/08846 ,  H04L67/08

摘要： A solution for emulating a hardware device is provided. In particular, a communication device that includes a standard mode of operation and a mapping mode of operation is used together with a control program to emulate communication with the hardware device. The mapping mode of operation is used to implement communication functionality that requires hardware, while the control program emulates other communication functionality previously provided by the hardware device. As a result, a protocol, such as a channel protocol, that requires hardware functionality can be successfully emulated using both the control program and the communication device.

摘要翻译： 提供了一种用于仿真硬件设备的解决方案。 特别地，与控制程序一起使用包括标准操作模式和映射操作模式的通信设备来模拟与硬件设备的通信。 操作的映射模式用于实现需要硬件的通信功能，而控制程序模拟先前由硬件设备提供的其他通信功能。 因此，可以使用控制程序和通信设备来成功地仿真需要硬件功能的协议，例如信道协议。