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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

US20100202467A1 PREMISES GATEWAY DEVICE 有权
标题翻译：网路设备
公开(公告)号：US20100202467A1
公开(公告)日：2010-08-12
申请号：US12632031
申请日：2009-12-07
申请人： Atsushi OTANI , Hisa TSUZUKI , Makoto HASEGAWA
发明人： Atsushi OTANI , Hisa TSUZUKI , Makoto HASEGAWA
IPC分类号： H04L12/56
CPC分类号： H04L12/2834 , G06F1/3203 , G06F1/324 , H04L63/0428 , H04L63/164 , H04Q11/0067 , Y02D10/126
摘要： In a premises gateway device that performs encryption or decryption under the IPsec, the throughput of a processor is varied depending on a type of data to be treated in order to realize reduction in power consumption. In the premises gateway device to which a telephone, PCs, and a home appliance that are pieces of home network equipment are connected and which transmits or receives data using an ISP and an IPsec tunnel via an ONU, an OLT, and a carrier network, relevant home network equipment and a data rate are decided based on the data to be treated. The frequency of a clock to be fed to the processor is varied depending on the information.
摘要翻译：在根据IPsec执行加密或解密的房屋网关设备中，处理器的吞吐量根据要处理的数据的类型而变化，以实现功耗的降低。在家庭网络设备连接的电话，PC和家用电器的房屋网关设备中，使用ISP和IPsec隧道经由ONU，OLT和运营商网络发送或接收数据，相关家庭网络设备和数据速率根据待处理的数据决定。要提供给处理器的时钟频率根据信息而变化。

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