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    • 2. 发明公开
    • Method and Related Network Element Providing Delay Measurement in an Optical Transport Network
    • Verfahren undzugehörigesNetzwerkelement zurVerzögerungsmessungin einem optischen Transportnetzwerk
    • EP2600546A1
    • 2013-06-05
    • EP11306605.4
    • 2011-12-02
    • Alcatel Lucent
    • Loehr, JuergenSturm, Wolfram
    • H04J3/06H04J3/16
    • H04B10/0795H04J3/0682H04J3/1652
    • A delay measurement method of a path (P) or path segment through a transport network and a corresponding network nodes (NE1, NE2) for performing the delay measurement are described, which provide a higher precision and lower jitter. An originating network node (NE1) inserts a delay measurement request signal (REQ) into an overhead subfield of a first data unit and transmits the first data unit over the path (P) or path segment to a far-end network node (NE2) as part of framed transport signals. The far-end network node (NE2), upon detection of the delay measurement request (REQ), inserts a delay measurement reply signal (REP) into an overhead subfield of a second data unit and transmits the second data unit back to the originating network node (NE1) using framed transport signals in reverse direction. The originating network node (NE1) determines a time difference between insertion of the delay measurement request signal (REQ) and receipt of the delay measurement reply signal (REP). The far-end network node (NE2) further determines an insertion time value indicative of a time difference (t1, t2, t3) between receipt of the delay measurement request signal (REQ) and insertion of the delay measurement reply signal (REP) in reverse direction and communicates the insertion time value back to the originating network node (NE1). The originating network node (NE1) then determines a delay value for the path (P) or path segment from the determined response time difference and the received insertion time value.
    • 描述了通过传输网络的路径(P)或路径段的延迟测量方法和用于执行延迟测量的相应网络节点(NE1,NE2),其提供更高的精度和更低的抖动。 始发网络节点(NE1)将延迟测量请求信号(REQ)插入到第一数据单元的开销子字段中,并将路径(P)或路径段上的第一数据单元发送到远端网络节点(NE2) 作为框架传输信号的一部分。 远端网络节点(NE2)在检测到延迟测量请求(REQ)后,将延迟测量应答信号(REP)插入到第二数据单元的开销子字段中,并将第二数据单元发回原始网络 节点(NE1)使用成帧的传输信号反向。 始发网络节点(NE1)确定延迟测量请求信号(REQ)的插入和延迟测量应答信号(REP)的接收之间的时间差。 远端网络节点(NE2)进一步确定指示延迟测量请求信号(REQ)的接收和延迟测量应答信号(REP)的插入之间的时间差(t1,t2,t3)的插入时间值 将插入时间值传回给始发网络节点(NE1)。 然后,起始网络节点(NE1)根据确定的响应时间差和接收到的插入时间值确定路径(P)或路径段的延迟值。
    • 8. 发明公开
    • Method of enabling a packet loss measurement in a packet transport network
    • 在einem Pakettransportnetzwerk的Verfahren zur Aktivierung der Paketverlustmessung
    • EP2429127A1
    • 2012-03-14
    • EP10305975.4
    • 2010-09-10
    • Alcatel Lucent
    • Addeo, ChristianBusi, ItaloBobbo, Gianluca
    • H04L12/26H04L12/56
    • H04L43/0829H04L49/3009H04L2012/5624
    • Proposed is a method of enabling a packet loss measurement in a network. Via a group of user ports data packets containing a same source address and a same destination address are received. A link aggregation of the group of user ports is performed. At a network port, received data packets are transmitted to a far end network edge node. A number of transmitted data packets is determined, and also for each of the user ports a number of data packets lost internally is determined. At the network port, a corrected number of transmitted data packets is indicated to the far end network edge node as the sum of the determined number of transmitted data packets the overall number of data packets lost internally.
    • 提出了一种在网络中实现分组丢失测量的方法。 通过一组用户端口接收包含相同源地址和相同目的地址的数据包。 执行用户端口组的链路聚合。 在网络端口,接收的数据分组被发送到远端网络边缘节点。 确定多个发送的数据分组,并且对于每个用户端口,确定内部丢失的数个数据分组。 在网络端口,向远端网络边缘节点指示已发送数据分组的校正次数,作为确定的发送数据分组数量与内部数据丢包总数之和的总和。
    • 9. 发明公开
    • Method and apparatus for restoring a connection through a provider network upon request
    • 根据请求通过提供商网络恢复连接的方法和设备
    • EP2426858A1
    • 2012-03-07
    • EP10305938.2
    • 2010-09-01
    • Alcatel Lucent
    • Grammel, GertLevrau, Lieven
    • H04L12/24
    • G06F11/1415H04L41/0668H04L43/0811
    • A method and related apparatus are provided for restoring a connection through a provider network (PN). In particular, a connection is established along a path (P1) through the provider network (PN) for the transport of client traffic between two client network nodes (CR1, CR2) of a client network (CD1, CD2). Any restoration service for this connection is deactivated. However, when a failure (F1) is detected along the path (P1) which affects the connection, a path search is performed anyhow to determine a projected restoration path (P2) through the provider network (PN) available to restore said failed connection. In the case that the path search was successful and a projected restoration path (P2) was found, the availability of the projected restoration path (P2) is communicated (MS1, MS2) to the client network (CD 1, CD2). The client can now decide whether to accept a temporary service upgrade to restoration service or not. Only after receipt of a confirmation (CM1, CM2) from said client network (CD1, CD2), a path restoration is performed to restore the failed connection over the projected restoration path (P2).
    • 提供了一种用于通过提供商网络(PN)来恢复连接的方法和相关设备。 具体地,沿着通过提供商网络(PN)的路径(P1)建立连接,以在客户端网络(CD1,CD2)的两个客户端网络节点(CR1,CR2)之间传输客户端业务。 此连接的任何恢复服务都将停用。 然而,当沿着影响连接的路径(P1)检测到故障(F1)时,无论如何执行路径搜索以确定通过可用于恢复所述失败连接的提供商网络(PN)的预计恢复路径(P2)。 在路径搜索成功并且找到预计恢复路径(P2)的情况下,将预计恢复路径(P2)的可用性传送给客户端网络(CD1,CD2)(MS1,MS2)。 客户现在可以决定是否接受临时服务升级来恢复服务。 仅在从所述客户网络(CD1,CD2)接收到确认(CM1,CM2)之后,才执行路径恢复,以恢复所述预计恢复路径(P2)上的失败连接。