公开(公告)号：WO2017000992A1

公开(公告)日：2017-01-05

申请号：PCT/EP2015/064859

申请日：2015-06-30

Applicant: TELECOM ITALIA S.P.A. ,  POLITECNICO DI TORINO

Inventor： CAPRIATA, Stefano ,  GAUDINO, Roberto ,  FERRERO, Valter ,  VALVO, Maurizio

IPC: H04J14/02

CPC classification number: H04B10/272 ,  H04B10/2507 ,  H04J14/0282

Abstract: It is disclosed a optical transmitter for an optical network unit of a multi- wavelength passive optical network comprising an optical line termination and a number of further optical network units for transmitting upstream signals to said optical line termination on multiple upstream channels. The optical transmitter is configured to generate and transmit an optical activation signal carrying activation information to be transmitted to said optical line termination on an upstream channel, the activation signal having an optical power lower than the optical power of each one of said upstream signals. The optical transmitter comprises an optical source, a first electric source configured to modulate the optical source with a first electric signal carrying the activation information; and a second electric source configured to directly modulate the optical source with a second electric signal so as to produce a frequency chirp on the optical activation signal.

Abstract translation: 公开了一种用于多波长无源光网络的光网络单元的光发射机，其包括光线路终端和用于将上行信号发送到多个上行信道上的所述光线路终端的多个另外的光网络单元。 光发送器被配置为产生并发送携带启动信息的光激活信号，以在上行信道上发送到所述光线路终端，激活信号具有低于每个所述上行信号的光功率的光功率。 光发射机包括光源，第一电源，被配置为用携带激活信息的第一电信号调制光源; 以及第二电源，被配置为用第二电信号直接调制所述光源，以在所述光激活信号上产生频率啁啾。

公开(公告)号：WO2016034207A1

公开(公告)日：2016-03-10

申请号：PCT/EP2014/068573

申请日：2014-09-02

Applicant: TELECOM ITALIA S.P.A. ,  POLITECNICO DI TORINO

Inventor： GAUDINO, Roberto ,  FERRERO, Valter ,  MERCINELLI, Roberto ,  VALVO, Maurizio

IPC: H04J14/02

CPC classification number: H04J14/0282 ,  H04B10/272 ,  H04J14/0227 ,  H04J14/0252

Abstract: It is disclosed a method for activating an ONU in a multi-wavelength PON. Other ONUs may be already active and transmit upstream signals to the OLT on various upstream channels. The new ONU transmits an activation signal superimposed to such upstream signals. Since the ONU may comprise an uncalibrated tunable transmitter, initially the activation signal wavelength might be different from that upon which the ONU shall be activated. The activation signal optical power is lower than the other upstream signals, so as not to impair their reception at the OLT. The OLT operates the ONUs already active on the upstream channel on which the new ONU shall be activated to suspend transmission for one or more time gaps, during which the OLT detects the activation signal. This improves the activation signal detection conditions, thereby allowing to increase its bitrate. An acceptable duration of the activation procedure is then achieved.

Abstract translation: 公开了一种在多波长PON中激活ONU的方法。 其他ONU可能已经是活动的，并且在上行信道上向OLT发送上行信号。 新的ONU将叠加的激活信号发送到这样的上行信号。 由于ONU可能包括未校准的可调谐发射机，所以最初的激活信号波长可能不同于ONU将被激活的波长。 激活信号光功率低于其他上行信号，从而不损害其在OLT处的接收。 OLT操作在新的ONU被激活的上行信道上已经有效的ONU暂停一个或多个时隙的传输，在该时间间隔期间OLT检测到激活信号。 这改善了激活信号检测条件，从而允许增加其比特率。 然后实现激活程序的可接受的持续时间。