公开(公告)号：EP2974077A1

公开(公告)日：2016-01-20

申请号：EP13708488.5

申请日：2013-03-12

申请人： Telefonaktiebolaget L M Ericsson (publ)

发明人： COSTANTINI, Matteo

IPC分类号： H04B10/079 ,  H04J14/02

CPC分类号： H04J14/0221 ,  H04B10/07955 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0268

摘要： A method (10) of controlling optical signal power levelling in an optical communication network node configured to apply an optical attenuation, α, to a pass-through optical signal. The method comprises: a. performing the following steps i. to iii. until an attenuation variation value, Δα, is greater than a preselected attenuation variation threshold value (18), ΔαTH: i. measuring (12) an optical signal power of an optical signal; ii. calculating (14) a difference, ΔP, between the measured optical signal power and a target optical signal power; iii. calculating (16) a value for the attenuation variation, Δα, to be applied to the optical attenuation taking account of ΔP; b. obtaining (20) a current value of the optical attenuation, αn, and obtaining (22) a new optical attenuation value, αn+1, in dependence on the current value of the optical attenuation, a current value of the attenuation variation, Δαn, and at least an earlier value of the attenuation variation, Δαn−1; and c. generating (24) a control signal arranged to configure the node to apply the new optical attenuation value, αn+1.

摘要翻译： 一种控制光通信网络节点中的光信号功率调平的方法（10），被配置为将光衰减α应用于直通光信号。 该方法包括：a。 执行以下步骤i。 到iii。 直到衰减变化值＆Dgr;α大于预选的衰减变化阈值（18），＆Dgr;αTH：i。 测量（12）光信号的光信号功率; II。 在测量的光信号功率和目标光信号功率之间计算（14）差值＆Dgr; P; III。 计算（16）衰减变化的值，＆Dgr;α，应用于考虑到＆Dgr; P的光衰减; 湾 获得（20）光衰减的当前值αn，并根据光衰减的当前值，衰减变化的当前值＆Dgr获得（22）新的光衰减值αn+ 1。 αn，并且衰减变化的至少较早的值，＆Dgr;αn-1; 和c。 生成（24）配置为使节点应用新的光衰减值αn+ 1的控制信号。

公开(公告)号：EP2859670A1

公开(公告)日：2015-04-15

申请号：EP12726803.5

申请日：2012-06-11

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： COSTANTINI, Matteo ,  MAGRI, Roberto

IPC分类号： H04B10/07 ,  H04Q11/00 ,  H04J14/02

CPC分类号： H04L63/1416 ,  H04B10/85 ,  H04J14/0204 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0227 ,  H04J14/04 ,  H04Q11/0062 ,  H04Q2011/0079 ,  H04Q2011/0083

摘要： Apparatus for an optical communications network has optical paths for optical traffic, and optical ports, one of which is an unused output port. A security monitoring system has a blocking part coupled removably to the unused output port to occupy it to prevent unauthorized access. An optical detector can detect optical signals passing through the unused output port to the blocking part, and there is alarm circuitry configured to output an alarm signal based on the detecting of the optical signals. This monitoring can help make the node more secure from interference or from eavesdropping. By blocking the port, the monitoring can be independent of the type of signals on the optical paths. The system can be passive or active, and does not require a change in the installed node configuration and so can be added easily to existing infrastructure.