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    METHOD FOR SYNCHRONIZING LOCAL CLOCKS IN A DISTRIBUTED COMPUTER NETWORK
    1.
    发明公开
    METHOD FOR SYNCHRONIZING LOCAL CLOCKS IN A DISTRIBUTED COMPUTER NETWORK 有权
    在分布式计算机网络中同步本地时钟的方法

    公开(公告)号：EP2297885A1

    公开(公告)日：2011-03-23

    申请号：EP08747910.1

    申请日：2008-06-02

    Applicant: TTTech Computertechnik AG ,  Honeywell International Inc.

    Inventor： STEINER, Wilfried ,  BAUER, Günter ,  WÄCHTER, Matthias ,  PAULITSCH, Michael ,  HALL, Brendan

    IPC: H04J3/06

    CPC classification number: H04J3/0676 ,  H04J3/0652 ,  H04L7/10

    Abstract: The invention relates to a method for synchronizing local clocks in a distributed computer network, where said computer network consists of a number of end systems and at least two switches, where each end system is connected to at least two switches via bidirectional communication links, and where a configured subset of end systems and switches executes the method in form of a synchronization state machine, characterized in that a) the state machine uses at least three different frame types (coldstart frame type, coldstart acknowledge frame type, and integration frame type), and b) the states in the state machine are either said to belong to an unsynchronized set of states or belong to a synchronized set of states, and c) all end systems that are configured as Synchronization Master periodically send coldstart frames in one of the unsynchronized states, and d) all end systems that are configured as Synchronization Master react to the reception of a coldstart frame by sending a coldstart acknowledgment frame a configurable first timeout (CSO) after the reception of the coldstart frame on all replicated communication channels, provided that the end system is in a state in which the synchronization state machine defines a transition for coldstart frames, and where said first timeout (CSO) is reset when a consecutive coldstart frame is received before the coldstart acknowledge is sent, and e) all end systems that are configured as Synchronization Master react to the reception of a coldstart acknowledgment frame by starting a configurable second timeout (CAO), provided that they are not already executing said first timeout (CSO), and entering a synchronized state when said second timeout (CAO) expires.

    Abstract translation: 本发明涉及一种用于同步分布式计算机网络中的本地时钟的方法，其中所述计算机网络由多个终端系统和至少两个交换机组成，其中每个终端系统通过双向通信链路连接到至少两个交换机，以及 其中配置的终端系统和交换机子集以同步状态机的形式执行该方法，其特征在于a）状态机使用至少三种不同的帧类型（冷启动帧类型，冷启动确认帧类型和整合帧类型） ，以及b）状态机中的状态或者被认为属于一组未被同步的状态或者属于同步的一组状态，以及c）被配置为同步主机的所有终端系统周期性地发送冷启动帧 非同步状态，以及d）配置为同步主设备的所有终端系统通过发送冷启动对冷启动帧的接收作出反应 rt确认在所有复制的通信信道上接收到冷启动帧之后的可配置第一超时（CSO），假定终端系统处于其中同步状态机定义用于冷启动帧的转换的状态，并且其中所述第一超时 （CSO）在发送冷启动确认之前接收到连续的冷启动帧时复位; e）配置为同步主设备的所有终端系统通过启动可配置的第二超时（CAO）来响应冷启动确认帧的接收， 只要它们尚未执行所述第一超时（CSO），并且当所述第二超时（CAO）到期时进入同步状态。

    METHOD FOR SYNCHRONIZING LOCAL CLOCKS IN A DISTRIBUTED COMPUTER NETWORK
    2.
    发明公开
    METHOD FOR SYNCHRONIZING LOCAL CLOCKS IN A DISTRIBUTED COMPUTER NETWORK 有权
    一种用于在分布式计算机网络上同步当地时间DONORS

    公开(公告)号：EP2297886A1

    公开(公告)日：2011-03-23

    申请号：EP08756803.6

    申请日：2008-06-02

    Applicant: TTTech Computertechnik AG ,  Honeywell International Inc.

    Inventor： STEINER, Wilfried ,  BAUER, Günther ,  WÄCHTER, Matthias ,  PAULITSCH, Michael ,  HALL, Brendan

    IPC: H04J3/06

    CPC classification number: H04L67/1095 ,  H04J3/0641 ,  H04J3/0664 ,  H04J3/067 ,  H04J3/0673 ,  H04J3/0679

    Abstract: A method for synchronizing local clocks in a distributed computer network includes a number of components that are connected to each other via bi-directional communication links. An a priori configured set of components generates synchronization messages and sends these messages to the network. An a priori configured set of components consumes the generated messages. One or more message-relaying components in between a component that generates a synchronization message and the component that consumes the message adds delay value to the message reflecting the delay imposed by the message-relaying component. A component that is configured to consume a synchronization message delays a received synchronization message upon reception for a duration that is calculated by an a priori configured value for the maximum transmission delay minus the value of the sum of all delay values added to the received message before further usage of the message in the synchronization process.

    METHOD FOR SYNCHRONIZING LOCAL CLOCKS IN A DISTRIBUTED COMPUTER NETWORK
    4.
    发明授权
    METHOD FOR SYNCHRONIZING LOCAL CLOCKS IN A DISTRIBUTED COMPUTER NETWORK 有权
    在分布式计算机网络中同步本地时钟的方法

    公开(公告)号：EP2297886B1

    公开(公告)日：2013-02-20

    申请号：EP08756803.6

    申请日：2008-06-02

    Applicant: TTTech Computertechnik AG ,  Honeywell International, Inc.

    Inventor： STEINER, Wilfried ,  BAUER, Günther ,  WÄCHTER, Matthias ,  PAULITSCH, Michael ,  HALL, Brendan

    IPC: H04J3/06

    CPC classification number: H04L67/1095 ,  H04J3/0641 ,  H04J3/0664 ,  H04J3/067 ,  H04J3/0673 ,  H04J3/0679

    Abstract: A method for synchronizing local clocks in a distributed computer network includes a number of components that are connected to each other via bi-directional communication links. An a priori configured set of components generates synchronization messages and sends these messages to the network. An a priori configured set of components consumes the generated messages. One or more message-relaying components in between a component that generates a synchronization message and the component that consumes the message adds delay value to the message reflecting the delay imposed by the message-relaying component. A component that is configured to consume a synchronization message delays a received synchronization message upon reception for a duration that is calculated by an a priori configured value for the maximum transmission delay minus the value of the sum of all delay values added to the received message before further usage of the message in the synchronization process.

    SAFE START-UP OF A NETWORK
    5.
    发明授权
    SAFE START-UP OF A NETWORK 有权
    安全驾驶网络模式

    公开(公告)号：EP1900127B1

    公开(公告)日：2012-02-08

    申请号：EP06752581.6

    申请日：2006-06-28

    Applicant: TTTech Computertechnik AG

    Inventor： STEINER, Wilfried ,  ANGELOW, Harald ,  BAUER, Günter ,  HALL, Brendan

    IPC: H04J3/06 ,  H04L7/10

    CPC classification number: H04J3/0652 ,  H04L7/10

    Abstract: The invention relates to a method for start-up of a network, the network consisting of a number of nodes, which are connected via channels, and wherein the nodes are able to exchange information in the form of messages via said channels. According to the invention the transition phase of a synchronizing node from its initial phase to a synchronized phase is separated in a first so-called integration phase and a second subsequent so-called cold-start phase. A synchronizing node in the integration phase is listening to messages being sent from nodes in the synchronized phase and only reacts to an integration message (i-frame) if said integration message is a valid message. Furthermore, a synchronizing node, in the case that integration of said synchronizing node to a set of already synchronized nodes was not successful after a specifiable period, changes into the cold-start phase, in which a cold-start procedure of the node is executed, wherein in the cold-start phase said node does not react to integration messages (i-frames) of a node in the synchronized phase.

    SAFE START-UP OF A NETWORK
    9.
    发明公开
    SAFE START-UP OF A NETWORK 有权
    安全驾驶网络模式

    公开(公告)号：EP1900127A1

    公开(公告)日：2008-03-19

    申请号：EP06752581.6

    申请日：2006-06-28

    Applicant: TTTech Computertechnik AG

    Inventor： STEINER, Wilfried ,  ANGELOW, Harald ,  BAUER, Günter ,  HALL, Brendan

    IPC: H04J3/06 ,  H04L7/10

    CPC classification number: H04J3/0652 ,  H04L7/10

    Abstract: The invention relates to a method for start-up of a network, the network consisting of a number of nodes, which are connected via channels, and wherein the nodes are able to exchange information in the form of messages via said channels. According to the invention the transition phase of a synchronizing node from its initial phase to a synchronized phase is separated in a first so-called integration phase and a second subsequent so-called cold-start phase. A synchronizing node in the integration phase is listening to messages being sent from nodes in the synchronized phase and only reacts to an integration message (i-frame) if said integration message is a valid message. Furthermore, a synchronizing node, in the case that integration of said synchronizing node to a set of already synchronized nodes was not successful after a specifiable period, changes into the cold-start phase, in which a cold-start procedure of the node is executed, wherein in the cold-start phase said node does not react to integration messages (i-frames) of a node in the synchronized phase.

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