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    • 1. 发明申请
    • METHOD FOR SYNCHRONIZATION OF NETWORK NODES
    • 网络节点同步的方法
    • WO2006097880A1
    • 2006-09-21
    • PCT/IB2006/050759
    • 2006-03-10
    • PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHKONINKLIJKE PHILIPS ELECTRONICS N.V.BUDDE, WolfgangSUTERS, Tom
    • BUDDE, WolfgangSUTERS, Tom
    • H04J3/06H04L12/56
    • H04L12/403H04B7/269H04J3/0664H04L12/18H04W4/08H04W8/26H04W84/12
    • Method for synchronization of network nodes in a LAN (10) including a central network master-node (11) and a plurality of synchronization domains (20, 30), each synchronization subnetwork (20,30) includes a synchronization submaster (21, 31) and at least one synchronization slave-node (22, 23; 32, 33), the method comprising the following steps: setting up or change a multicast group for each synchronization domain (20, 30), wherein a multicast group includes MAC addresses of all synchronization slaves (22, 23; 32, 33) of the synchronization domain (20, 30); transmitting a first synchronization message (12) at time n from the central master-node (11) to all other network nodes (21, 22, 23; 31, 32, 33); receiving the first synchronization message in all other network nodes (21, 22, 23; 31, 32, 33); capturing a local clock value A x,y (n) at receiving the first synchronization message (12) in each other network nodes (21, 22, 23; 31, 32, 33); multicasting a second synchronization message (13) by the synchronization master-nodes (21, 31) to the synchronization slaves-nodes (22, 23; 32, 33) at time within the associated synchronization domain (20, 30), wherein the second synchronization message (13) includes the local clock value Ax,o(n) of the associated synchronization master-node (21, 31) of the synchronization slave-nodes (22, 23; 32, 33) within the respective synchronization domain (20, 30); receiving the second synchronization message (13) in the synchronization slave-nodes (22, 23; 32, 33) including the clock value A x,o (n) of the associated synchronization master-node (21, 31); comparing the local clock value A xy (n) captured at receiving of the first synchronization message (12) with the clock value A x,o (n) received with the second synchronization message (13); and adjusting the local clock in the synchronization slave-node (22, 23; 32, 33) depending on the comparison result.
    • 一种用于在包括中央网络主节点(11)和多个同步域(20,30)的LAN(10)中的网络节点同步的方法,每个同步子网(20,30)包括同步子主管(21,31 )和至少一个同步从节点(22,23; 32,33),所述方法包括以下步骤:为每个同步域(20,30)建立或改变多播组,其中多播组包括MAC地址 的所述同步域(20,30)的所有同步从站(22,23; 32,33); 在时间n从中央主节点(11)向所有其他网络节点(21,22,23; 31,32,33)发送第一同步消息(12); 在所有其他网络节点(21,22,23; 31,32,33)中接收所述第一同步消息; 在接收每个其他网络节点(21,22,23; 31,32,33)中的第一同步消息(12)时捕获本地时钟值A x,y(n); 在所述相关联的同步域(20,30)内的时间,所述同步主节点(21,31)将第二同步消息(13)多播到所述同步从属节点(22,23; 32,33),其中所述第二 同步消息(13)包括相应同步域(20)内的同步从节点(22,23; 32,33)的相关同步主节点(21,31)的本地时钟值Ax,o(n) ,30); 在包括相关联的同步主节点(21)的时钟值A x,o(n)的同步从节点(22,23; 32,33)中接收第二同步消息(13) ,31); 将在接收到第一同步消息(12)时捕获的本地时钟值A SUB(N)与第二同步消息(12)接收的时钟值A X,O(n)进行比较 同步消息(13); 以及根据比较结果调整同步从节点(22,23; 32,33)中的本地时钟。