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1. 发明申请

US20120057865A1 COMMUNICATION SYSTEM AND TIME SYNCHRONIZATION METHOD 有权
标题翻译：通信系统和时间同步方法
公开(公告)号：US20120057865A1
公开(公告)日：2012-03-08
申请号：US13210165
申请日：2011-08-15
申请人： Makoto HASEGAWA , Kazuyori UMEMATSU , Tohru KAZAWA , Atsushi OTANI
发明人： Makoto HASEGAWA , Kazuyori UMEMATSU , Tohru KAZAWA , Atsushi OTANI
IPC分类号： H04B10/08 , H04J14/00
CPC分类号： H04J3/0655 , H04J3/0644 , H04J3/0673 , H04J3/0682
摘要： In a communication system using a PON, time synchronization of a slave device such as a base station is realized with respect to a master device such as an L2SW or the base station. Time information acquired by a GPS satellite is corrected by ranging information of a discovery function of an OLT so as to be reflected on time information of each ONU. A propagation delay from the L2SW to the OLT is obtained with the use of a delay estimation mechanism, a propagation delay from the OLT to the ONU which is obtained by ranging is added to obtain a propagation delay from the L2SW to the ONU. The obtained propagation delay from the L2SW to the ONU is added to the transmitted time stamp value whereby a time stamp value received at a base station or femtocell side becomes a time into which the propagation delay to the ONU is incorporated, and absolute values of clock timers can be synchronized with each other. The addition process can be realized by rewriting the time stamp value of the packet within the OLT or the ONU.
摘要翻译：在使用PON的通信系统中，相对于诸如L2SW或基站的主设备实现诸如基站的从设备的时间同步。由GPS卫星获取的时间信息由OLT的发现功能的测距信息进行校正，以反映在每个ONU的时间信息上。通过使用延迟估计机制获得从L2SW到OLT的传播延迟，通过添加通过测距获得的从OLT到ONU的传播延迟，以获得从L2SW到ONU的传播延迟。所获得的从L2SW到ONU的传播延迟被添加到发送的时间标记值，由此在基站或毫微微小区侧接收的时间标记值变为并入到ONU的传播延迟的时间，以及时钟的绝对值定时器可以彼此同步。可以通过重写OLT或ONU内的分组的时间戳值来实现相加处理。

2. 发明申请

US20090304388A1 Optical Branching Apparatus and Passive Optical Network System 审中-公开
标题翻译：光分支器和被动光网络系统
公开(公告)号：US20090304388A1
公开(公告)日：2009-12-10
申请号：US12477952
申请日：2009-06-04
申请人： Kazuyori UMEMATSU , Yusuke Yajima , Tsuyoshi Kano , Toshiki Sugawara
发明人： Kazuyori UMEMATSU , Yusuke Yajima , Tsuyoshi Kano , Toshiki Sugawara
IPC分类号： H04J14/02
CPC分类号： H04J14/0282
摘要： In the case where, in a WDM-PON system, a high-output optical signal or a pseudo signal for illegal access by a hostile user, or an optical signal with a wavelength which is not assigned from an OLT is input to an ONU-side optical fiber, the quality of communications for other users is possibly affected and a receiver on the station side is possibly destroyed. By providing an optical blocking unit at a position near an ONU-side optical splitter of an optical branching unit, in the case where input of an extraordinary optical signal is detected, an optical route into which the extraordinary optical signal is input is blocked, so that the input of the extraordinary optical signal to an OLT and optical lines shared by plural users can be preliminarily blocked.
摘要翻译：在WDM-PON系统中，由用户非法接入的高输出光信号或伪信号或者没有从OLT分配的具有波长的光信号输入到ONU- 其他用户的通信质量可能受到影响，站侧的接收机可能被破坏。通过在光分路单元的ONU侧光分路器附近的位置设置光阻断单元，在检测到异常光信号的输入的情况下，输入异常光信号的光路被阻塞，所以可以预先阻止非常光信号向OLT和多个用户共享的光线路的输入。

3. 发明授权

US08712244B2 Communication system and time synchronization method 有权
标题翻译：通信系统和时间同步方法
公开(公告)号：US08712244B2
公开(公告)日：2014-04-29
申请号：US13210165
申请日：2011-08-15
申请人： Makoto Hasegawa , Kazuyori Umematsu , Tohru Kazawa , Atsushi Otani
发明人： Makoto Hasegawa , Kazuyori Umematsu , Tohru Kazawa , Atsushi Otani
IPC分类号： H04J14/08 , H04B10/00
CPC分类号： H04J3/0655 , H04J3/0644 , H04J3/0673 , H04J3/0682
摘要： In a communication system using a PON, time synchronization of a slave device such as a base station is realized with respect to a master device such as an L2SW or the base station. Time information acquired by a GPS satellite is corrected by ranging information of a discovery function of an OLT so as to be reflected on time information of each ONU. A propagation delay from the L2SW to the OLT is obtained with the use of a delay estimation mechanism, a propagation delay from the OLT to the ONU which is obtained by ranging is added to obtain a propagation delay from the L2SW to the ONU. The obtained propagation delay from the L2SW to the ONU is added to the transmitted time stamp value whereby a time stamp value received at a base station or femtocell side becomes a time into which the propagation delay to the ONU is incorporated, and absolute values of clock timers can be synchronized with each other. The addition process can be realized by rewriting the time stamp value of the packet within the OLT or the ONU.
摘要翻译：在使用PON的通信系统中，相对于诸如L2SW或基站的主设备实现诸如基站的从设备的时间同步。由GPS卫星获取的时间信息由OLT的发现功能的测距信息进行校正，以反映在每个ONU的时间信息上。通过使用延迟估计机制获得从L2SW到OLT的传播延迟，通过添加通过测距获得的从OLT到ONU的传播延迟，以获得从L2SW到ONU的传播延迟。所获得的从L2SW到ONU的传播延迟被添加到发送的时间标记值，由此在基站或毫微微小区侧接收的时间标记值变为并入到ONU的传播延迟的时间，并且时钟的绝对值定时器可以彼此同步。可以通过重写OLT或ONU内的分组的时间戳值来实现相加处理。

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