US Patent No. 9,325,442

EXTERNALLY CONNECTED TIME PORT CHANGEOVER METHOD AND DEVICE


Patent No. 9,325,442
Issue Date April 26, 2016
Title Externally Connected Time Port Changeover Method And Device
Inventorship Xiaoxia Li, Shenzhen (CN)
Hailiang Zhan, Shenzhen (CN)
Assignee ZTE Corporation, Shenzhen (CN)

Claim of US Patent No. 9,325,442

1. An externally connected time port changeover method, comprising:
transmitting, by a node which currently serves as a grand master (GM) node, time information via a first externally connected
time port of the node;

if the first externally connected time port fails, updating, by the node, a current node priority of the node and current
GM node priority of the node as preset node priority, wherein the preset node priority is node priority configured for the
node when the node is activated; and

judging, the node, whether or not a second externally connected time port of the node is in an up state and whether priority
of the second externally connected time port is higher than the current GM node priority of the node, and if the second externally
connected time port of the node is in an up state and the priority of the second externally connected time port is higher
than the current GM node priority of the node, then activating the second externally connected time port to transmit time
information.