公开(公告)号：US11758421B2

公开(公告)日：2023-09-12

申请号：US15566462

申请日：2016-04-15

Applicant: Nokia Solutions and Networks Oy

Inventor： David Chen ,  Pekka Juhani Wainio ,  Kari Seppanen ,  Tapio Suihko ,  Jorma Kilpi ,  Jori Paananen

IPC: H04W24/04 ,  H04W28/02 ,  H04W28/08 ,  H04W28/26 ,  H04W40/22 ,  H04W40/24 ,  H04W72/12 ,  H04L12/753 ,  H04L45/48 ,  H04L41/12 ,  H04L45/28 ,  H04L45/00 ,  H04W72/1263 ,  H04W40/10 ,  H04L45/18 ,  H04W84/04 ,  H04W84/18 ,  H04W88/16

CPC classification number: H04W24/04 ,  H04L41/12 ,  H04L45/22 ,  H04L45/28 ,  H04L45/48 ,  H04W28/021 ,  H04W28/0268 ,  H04W28/0942 ,  H04W28/26 ,  H04W40/22 ,  H04W40/248 ,  H04W72/1263 ,  H04L45/18 ,  H04L2212/00 ,  H04W40/10 ,  H04W84/045 ,  H04W84/18 ,  H04W88/16 ,  Y02D30/70

Abstract: A mesh network includes domain(s) of multiple nodes interconnected through links and in which there are gateway(s) connecting a domain to another network. The domain(s), their multiple nodes, and their links are part of a topology. A set of primary and backup routing paths, each including an ST that includes the selected gateway and route to that selected gateway for nodes in the domain, for a selected one of the gateway(s) is accessed or determined. Schedule(s) to be used by node(s) in the mesh network over one or more scheduling cycles are accessed or determined. Based on status of link(s) between nodes and on the schedule(s), switching is performed to a selected one of the primary or backup routing paths for the selected gateway. Routing in the mesh network is caused to be modified based on the selected routing path. Information is sent to nodes for the paths and schedules.

公开(公告)号：US09219562B2

公开(公告)日：2015-12-22

申请号：US14272978

申请日：2014-05-08

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： David Chen

IPC: H01J3/06 ,  H04J3/06

CPC classification number: H04J3/0658 ,  H04J3/0641 ,  H04J3/0644 ,  H04J3/0679

Abstract: Systems, methods, apparatuses, and computer program products for dynamically redistributing timing and synchronization in a packet switched network are provided. One method includes creating, by a slave node, a peer list comprising an identifier of at least one peer slave node that shares a same master node as the slave node or that has a certain predefined affinity with the slave node. The method may also include announcing a holdover time of the slave node to the at least one peer slave node, and, when a predefined event occurs, announcing to the at least one peer slave node that the slave node is taking on a mini-master role for at least the announced holdover time.

Abstract translation: 提供了用于在分组交换网络中动态重新分配定时和同步的系统，方法，设备和计算机程序产品。 一种方法包括由从节点创建包括与从节点共享相同主节点的至少一个对等从节点的标识符或与从节点具有一定预定义关联的对等体列表。 所述方法还可以包括向所述至少一个对等从节点通知所述从节点的保持时间，以及当预定事件发生时，向所述至少一个对等从节点向所述从节点通知所述从节点正在接收的小型主节点 至少起到宣布的停留时间的作用。

公开(公告)号：US20170208473A1

公开(公告)日：2017-07-20

申请号：US15476030

申请日：2017-03-31

Applicant: Nokia Solutions and Networks Oy

Inventor： David Chen ,  Umamaheswar Kakinada ,  Mohammed Petiwala ,  Mohsin Zia

IPC: H04W12/10 ,  H04J3/06 ,  H04L12/26 ,  H04L12/911 ,  H04L29/06 ,  H04W12/02

CPC classification number: H04W12/10 ,  H04J3/0661 ,  H04L43/106 ,  H04L47/825 ,  H04L63/0272 ,  H04L63/0428 ,  H04L63/164 ,  H04L2209/80 ,  H04L2463/121 ,  H04W12/02

Abstract: Methods, devices, systems, techniques, and computer program products are provided to secure timing synchronization to network nodes connected over an inherently insecure best effort public network with mechanisms to improve accuracy of timing protocols such as a statistically estimated edge timestamp offset encoded into the timing message to account for network jitter and processing latency variances incurred due to the security packet processing and encryption; to ensure slave network nodes shall only accept timing messages from trusted timing sources; to establish a secure tunnel with a trusted timing source for exchange of timing packets; to provide authentication and security for timing packets over the insecure public network; and to enhance message anonymity with variable payload padding.