Invention Grant
- Patent Title: Maintaining distribution-network-wide time synchronization in smart grid devices
- Patent Title (中): 在智能电网设备中维护配电网络时间同步
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Application No.: US14184820Application Date: 2014-02-20
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Publication No.: US09332072B2Publication Date: 2016-05-03
- Inventor: Jonathan W. Hui , Wei Hong
- Applicant: Cisco Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Parker Ibrahim & Berg LLC
- Agent James M. Behmke; Stephen D. LeBarron
- Main IPC: G06F15/16
- IPC: G06F15/16 ; H04L29/08 ; H02J13/00 ; G06F1/12

Abstract:
In one embodiment, an alternating circuit (AC) power connected node in a shared-media communication network (with knowledge of a current time) determines a time value of a particular zero-crossing event of the AC power, and sends a message to a neighbor node indicating the time value of the particular zero-crossing event to allow the neighbor node to synchronize its time by coordinating the time value to its detection of the particular zero-crossing event. In another embodiment, the neighboring node determines one or more local zero-crossing events of the AC power, such that upon receiving the message indicating a correct time value of the particular zero-crossing event, the neighboring node can synchronize its local time a current time by matching one of the one or more local zero-crossing events to the particular zero-crossing event and assigning the correct time value to the matched local zero-crossing event.
Public/Granted literature
- US20150237130A1 MAINTAINING DISTRIBUTION-NETWORK-WIDE TIME SYNCHRONIZATION IN SMART GRID DEVICES Public/Granted day:2015-08-20
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