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1. 发明申请

WO1997031447A1 INTERCONNECT FAULT DETECTION AND LOCALIZATION METHOD AND APPARATUS 审中-公开
标题翻译：互连故障检测和本地化方法和设备
公开(公告)号：WO1997031447A1
公开(公告)日：1997-08-28
申请号：PCT/US1997002788
申请日：1997-02-21
申请人： HAL COMPUTER SYSTEMS, INC.
发明人： HAL COMPUTER SYSTEMS, INC. , SASTRY, Raghu , LARSON, Jeffrey, D. , MU, Albert , SLICE, John, R. , SCHOBER, Richard, L., Jr. , WICKI, Thomas, M.
IPC分类号： H04L01/08
CPC分类号： H04L1/0057 , H04L1/08 , H04L1/24 , H04L43/50
摘要： A method and apparatus for detecting and isolating an interconnect fault in a packet switched network generates a parity check error code for status messages which are used for flow control in a packet switched network. The packet switched network uses a reverse flow control method wherein status messages are sent locally between adjacent nodes. A receiving node uses status messages to inform an adjacent node of the availability of the input buffers located in the receiving node. Included in the status message is a parity check code that is sent sequentially with the status message using two phases of a clock. The parity check code is a one bit parity check for each bit of the status message. Faults on the local interconnect are detected at the receiving node by performing a one bit parity check on the received status message using the accompanying parity code. Because the status message and the parity check code are transmitted over the same physical bit connections, the one bit parity check detects any "stuck out" or "open" faults in the link.
摘要翻译：用于检测和隔离分组交换网络中的互连故障的方法和装置为分组交换网络中用于流量控制的状态消息生成奇偶校验错误代码。分组交换网络使用逆向流控制方法，其中状态消息在相邻节点之间本地发送。接收节点使用状态消息来向相邻节点通知位于接收节点中的输入缓冲器的可用性。包括在状态消息中的是使用两个时钟相位的状态消息顺序发送的奇偶校验码。奇偶校验码是状态消息的每一位的一位奇偶校验。在接收节点通过使用伴随的奇偶校验码对接收到的状态消息执行一位奇偶校验来检测局部互连上的故障。由于状态消息和奇偶校验码通过相同的物理位连接发送，所以一位奇偶校验检测检测链路中的任何“卡住”或“打开”故障。

2. 发明申请

WO1997031458A1 SYSTEM AND METHOD FOR DYNAMIC NETWORK TOPOLOGY EXPLORATION 审中-公开
标题翻译：动态网络拓扑学探索的系统与方法
公开(公告)号：WO1997031458A1
公开(公告)日：1997-08-28
申请号：PCT/US1997002631
申请日：1997-02-21
申请人： HAL COMPUTER SYSTEMS, INC.
发明人： HAL COMPUTER SYSTEMS, INC. , WICKI, Thomas, M. , HELLAND, Patrick, J. , WEBER, Wolf-Dietrich , WILCKE, Winfried, W.
IPC分类号： H04L12/56
CPC分类号： H04L45/02
摘要： A system and method dynamically determines the topology of a source node routing network. A source node generates a ping frame, which includes a special code in the ping frame header to differentiate it from a data frame. The source node transmits the ping frame to a first router that is coupled to the source node. The first router routes the ping frame to an internal control frame handler. The control frame handler creates an echo frame that is transmitted back to the source node. The first router identifies the port from which the ping frame is received and places this information in the header of the echo frame along with an echo frame identifier. The body of the echo frame includes a first router identification code, identification of the port from which the ping frame is received, and connectivity information. The source node receives the echo frame and identifies routers and nodes to which a ping frame has not been sent based upon the connectivity information in the received echo frame. After selecting another node or router, the source node generates a second ping frame. The second ping frame is generated and operates in the same manner as the first ping frame. The source node continues generating and transmitting ping frames to all nodes and routers in the network. The source node identifies loops in the topology to avoid repetitive checking and identifies link and router failures.
摘要翻译：系统和方法动态地确定源节点路由网络的拓扑。源节点生成ping帧，其包括ping帧头中的特殊代码以将其与数据帧区分开。源节点将ping帧发送到耦合到源节点的第一路由器。第一个路由器将ping帧路由到内部控制帧处理程序。控制帧处理程序创建一个回传帧返回到源节点。第一个路由器识别从其接收ping帧的端口，并将该信息与回波帧标识符一起放置在回波帧的报头中。回波帧的主体包括第一路由器标识码，接收到ping帧的端口的标识和连接信息。根据所接收的回波帧中的连通性信息，源节点接收回波帧并识别尚未发送ping帧的路由器和节点。选择另一个节点或路由器后，源节点将生成第二个ping帧。生成第二个ping帧并以与第一个ping帧相同的方式运行。源节点继续生成和发送Ping帧到网络中的所有节点和路由器。源节点标识拓扑中的循环，以避免重复检查，并识别链路和路由器故障。

3. 发明申请

WO1997031459A1 FLOW CONTROL PROTOCOL SYSTEM AND METHOD 审中-公开
标题翻译：流量控制协议系统和方法
公开(公告)号：WO1997031459A1
公开(公告)日：1997-08-28
申请号：PCT/US1997002664
申请日：1997-02-21
申请人： HAL COMPUTER SYSTEMS, INC.
发明人： HAL COMPUTER SYSTEMS, INC. , WICKI, Thomas, M. , HELLAND, Patrick, J. , LARSON, Jeffrey, D. , MU, Albert , SASTRY, Raghu , SCHOBER, Richard, L., Jr.
IPC分类号： H04L12/56
CPC分类号： H04L47/30 , H04L47/10 , H04L47/26
摘要： A system and method for controlling data transmission between two network elements. A first port of a transmitting element is coupled to a second port of a receiving element. The second port includes buffers for temporarily storing received data until the data can be sent to another element. Included in the transmitting element are a received-currently-full register (RCFR), a sent-and-not-received register (SANRR), and a buffer-busy register (BBR). The transmitting element checks its BBR to determine if a buffer in the receiving element is available. The availability of buffers can be determined using a single priority protocol or a multiple priority protocol. When data is received by the receiving element, it is sent to an available buffer. When the data is received by the buffer, the receiving element sets a bit in a currently-full register (CFR) and a bit in a next-message-to-send register (NMTSR). Each bit is associated with the buffer. Each bit in the CFR indicates whether the associated buffer is empty. Each bit in the NMTSR indicates the value of the CFR register at the time the previous control signal was transmitted with the exception that if the CFR is not empty at any time between control signals, i.e., buffer status messages, then the NMTSR is set and will not be reset even if the buffer is empty when the control signal is transmitted. The control signal can include only the NMTSR or both the NMTSR and the CFR. The control signal is transmitted on the same signal line as data that is being sent from the data receiving element to the data transmitting element. The data receiving element can multiplex the frames being sent in this direction with the control signal.
摘要翻译：一种用于控制两个网络元件之间的数据传输的系统和方法。发射元件的第一端口耦合到接收元件的第二端口。第二端口包括用于临时存储接收到的数据的缓冲器，直到可以将数据发送到另一个元件。包含在发送元件中的是接收当前完整寄存器（RCFR），发送 - 未接收寄存器（SANRR）和缓冲器 - 忙寄存器（BBR）。发送元件检查其BBR以确定接收元件中的缓冲区是否可用。可以使用单一优先级协议或多优先级协议来确定缓冲区的可用性。当接收元件接收到数据时，它被发送到可用的缓冲器。当数据被缓冲器接收时，接收单元设置当前完整寄存器（CFR）中的位和下一个消息发送寄存器（NMTSR）中的位。每个位与缓冲区相关联。 CFR中的每个位指示关联的缓冲区是否为空。 NMTSR中的每个位表示在发送前一个控制信号时CFR寄存器的值，但如果在控制信号（即缓冲器状态消息）之间的任何时间CFR不为空，则设置NMTSR，即使当发送控制信号时缓冲器为空，也不会被复位。控制信号可以仅包括NMTSR或NMTSR和CFR两者。控制信号在与数据接收元件发送到数据发送元件的数据相同的信号线上发送。数据接收元件可以将在该方向上发送的帧与控制信号进行复用。

4. 发明公开

EP0823166A1 FLOW CONTROL PROTOCOL SYSTEM AND METHOD 失效
标题翻译：流量控制协议的系统和方法
公开(公告)号：EP0823166A1
公开(公告)日：1998-02-11
申请号：EP97907725.0
申请日：1997-02-21
申请人： HAL COMPUTER SYSTEMS, INC.
发明人： WICKI, Thomas, M. , HELLAND, Patrick, J. , LARSON, Jeffrey, D. , MU, Albert , SASTRY, Raghu , SCHOBER, Richard, L., Jr.
IPC分类号： H04L29 , H04L12 , H04L13
CPC分类号： H04L47/30 , H04L47/10 , H04L47/26
摘要： A system and method for controlling data transmission between two network elements. A first port of a transmitting element is coupled to a second port of a receiving element. The second port includes buffers for temporarily storing received data until the data can be sent to another element. Included in the transmitting element are a received-currently-full register (RCFR), a sent-and-not-received register (SANRR), and a buffer-busy register (BBR). The transmitting element checks its BBR to determine if a buffer in the receiving element is available. The availability of buffers can be determined using a single priority protocol or a multiple priority protocol. When data is received by the receiving element, it is sent to an available buffer. When the data is received by the buffer, the receiving element sets a bit in a currently-full register (CFR) and a bit in a next-message-to-send register (NMTSR). Each bit is associated with the buffer. Each bit in the CFR indicates whether the associated buffer is empty. Each bit in the NMTSR indicates the value of the CFR register at the time the previous control signal was transmitted with the exception that if the CFR is not empty at any time between control signals, i.e., buffer status messages, then the NMTSR is set and will not be reset even if the buffer is empty when the control signal is transmitted. The control signal can include only the NMTSR or both the NMTSR and the CFR. The control signal is transmitted on the same signal line as data that is being sent from the data receiving element to the data transmitting element. The data receiving element can multiplex the frames being sent in this direction with the control signal.

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