公开(公告)号：US20150358700A1

公开(公告)日：2015-12-10

申请号：US14831367

申请日：2015-08-20

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Shi-Wei LEE ,  Chih-Hung HSU ,  Jui-Ting WU ,  Xun-Da CHEN

IPC: H04Q11/00 ,  H04J14/08 ,  H04J3/06

CPC classification number: H04Q11/0067 ,  H04J3/0667 ,  H04J3/0673 ,  H04J14/08 ,  H04Q11/0005 ,  H04Q11/0066 ,  H04Q2011/0045

Abstract: An apparatus for enabling a passive optical network (PON) having an OLT and at least one ONU on supporting time synchronization is disclosed. The apparatus comprises a timestamp correction module configured to make at least one network delay between the OLT and the at least one ONU of the PON equivalent to an equivalent path delay, wherein the timestamp correction module, through the PON, makes the at least one ONU responsible for modifying the timestamp in at least one PTP packet from the OLT, so that a slave clock at the backend of the at least one ONU is equivalent to synchronizing with a virtual master clock. The disclosure computes and corrects PTP commands so that the PTP clock at an ONU's backend may synchronize precisely with the master clock at an OLT's front end.

Abstract translation: 公开了一种用于支持具有OLT和至少一个ONU的无源光网络（PON）的支持时间同步的装置。 所述装置包括：时间戳校正模块，被配置为在所述OLT与所述PON的所述至少一个ONU之间进行至少一个等效于等效路径延迟的网络延迟，其中所述时间戳校正模块通过所述PON使所述至少一个ONU 负责从OLT修改至少一个PTP分组中的时间戳，使得至少一个ONU的后端的从时钟等效于与虚拟主时钟同步。 该公开内容计算和修正PTP命令，使得ONU的后端的PTP时钟可以在OLT的前端与主时钟精准地同步。

公开(公告)号：US20140169792A1

公开(公告)日：2014-06-19

申请号：US13870593

申请日：2013-04-25

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Shi-Wei LEE ,  Chih-Hung Hsu ,  Jui-Ting Wu ,  Xun-Da Chen

IPC: H04L7/00

CPC classification number: H04Q11/0067 ,  H04J3/0667 ,  H04J3/0673 ,  H04J14/08 ,  H04Q11/0005 ,  H04Q11/0066 ,  H04Q2011/0045

Abstract: An apparatus for enabling a passive optical network (PON) having an OLT and at least one ONU on supporting time synchronization is disclosed. The apparatus comprises a timestamp correction module configured to make at least one network delay between the OLT and the at least one ONU of the PON equivalent to an equivalent path delay, wherein the timestamp correction module, through the PON, makes the at least one ONU responsible for modifying the timestamp in at least one PTP packet from the OLT, so that a slave clock at the backend of the at least one ONU is equivalent to synchronizing with a virtual master clock. The disclosure computes and corrects PTP commands so that the PTP clock at an ONU's backend may synchronize precisely with the master clock at an OLT's front end.

Abstract translation: 公开了一种用于支持具有OLT和至少一个ONU的无源光网络（PON）的支持时间同步的装置。 所述装置包括：时间戳校正模块，被配置为在所述OLT与所述PON的所述至少一个ONU之间进行至少一个等效于等效路径延迟的网络延迟，其中所述时间戳校正模块通过所述PON使所述至少一个ONU 负责从OLT修改至少一个PTP分组中的时间戳，使得至少一个ONU的后端的从时钟等效于与虚拟主时钟同步。 该公开内容计算和修正PTP命令，使得ONU的后端的PTP时钟可以在OLT的前端与主时钟精准地同步。

公开(公告)号：US20170005906A1

公开(公告)日：2017-01-05

申请号：US14981900

申请日：2015-12-28

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Yen-Chiu CHEN ,  Kuang-Yi LI ,  Yuan-Jia LIN ,  Shi-Wei LEE

IPC: H04L12/751 ,  H04L12/46 ,  H04L12/931 ,  H04L12/715 ,  H04L12/721

CPC classification number: H04L45/64 ,  H04L12/4641 ,  H04L45/48 ,  H04L45/66 ,  H04L47/12 ,  H04L47/125 ,  H04L49/351 ,  H04L49/354

Abstract: A network controlling method and a network controller are provided. The network controlling method includes the following steps. A hybrid SDN-Ethernet system including a plurality of hosts, a plurality of Ethernet switches and m Software-defined networking switches (SDN switches) is provided. m is larger than or equal to 1. A first path according to at least one default spanning tree in the hybrid SDN-Ethernet system is obtained. m×k optional paths are obtained. Each of the m SDN switches is set as a beginning of each of k of the m×k optional paths. A second path is selected according to the m×k optional paths and the first path of the at least one default spanning tree.

Abstract translation: 提供网络控制方法和网络控制器。 网络控制方法包括以下步骤。 提供了包括多个主机，多个以太网交换机和m个软件定义的网络交换机（SDN交换机）的混合SDN-以太网系统。 m大于或等于1.获得了根据混合SDN-以太网系统中的至少一个默认生成树的第一路径。 获得m×k个可选路径。 m SDN开关中的每一个被设置为m×k个可选路径的k个的开始。 根据m×k个可选路径和该至少一个默认生成树的第一路径来选择第二路径。