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    • 1. 发明申请
    • Method and apparatus for protection switch messaging on a shared mesh network
    • 用于共享网状网络上的保护交换机消息传递的方法和装置
    • US20050088963A1
    • 2005-04-28
    • US10691522
    • 2003-10-24
    • Peter PhelpsBrett CaldwellMark Allaye-ChanGary McKennaSu Zhao
    • Peter PhelpsBrett CaldwellMark Allaye-ChanGary McKennaSu Zhao
    • H04J3/14H04L1/00H04L12/24H04L12/26
    • H04J3/14H04L41/0663H04L43/0817H04L43/0882
    • A method for processing automatic protection switch (APS) messages at a network element in a tunnel provisioned across a data transport network in order to provide for distributed processing of protection switch request messages involves receiving new APS message at the NE; determining whether the NE is an end point of the tunnel, or a tandem of the tunnel and processing the message accordingly. If the NE is a tandem, message processing involves using local information about tunnel segments of the tunnel only maintained by the NE, to update the local information, and to selectively forward the updated information to adjacent NEs of the tunnel. If the NE is an end point, it updates a status of the tunnel. In a preferred embodiment all NEs are responsible for controlling pending and preemption indicators, and for initiating tunnel condition messages, and the end point NEs are responsible for initiating all other messages.
    • 在通过数据传输网络提供的隧道中的网络元件处理自动保护交换机(APS)消息以提供保护交换机请求消息的分布式处理的方法涉及在NE处接收新的APS消息; 确定所述网元是所述隧道的终点还是所述隧道的串联,并相应地处理所述消息。 如果NE是串联的,则消息处理涉及使用仅由网元维护的隧道的隧道段的本地信息,更新本地信息,并选择性地将更新的信息转发到隧道的相邻NE。 如果NE是终点,则更新隧道的状态。 在优选实施例中,所有NE负责控制挂起和抢占指示符,并且用于发起隧道条件消息,并且终点NE负责发起所有其他消息。