Configuration method and apparatus for synchronization network

Patent metadata

Field	Value
Publication number	US-2018123717-A1
Application number	US-201515565032-A
Country	US
Kind code	A1
Filing date	Aug 26, 2015
Priority date	Apr 8, 2015
Publication date	May 3, 2018
Grant date	—

Abstract

The present disclosure relates to a configuration method and apparatus for a synchronization network. The method includes: determining at least the following information: topology of the synchronization network, and the number of external clocks enabled by the synchronization network; and performing clock configuration for the synchronization network according to the determined information

First claim

1 . A configuration method for a synchronization network, comprising:
determining at least the following information: topology of the synchronization network, and the number of external clocks enabled by the synchronization network; and performing clock configuration for the synchronization network according to the determined information.

2 . The configuration method according to claim 1 , wherein:
if the synchronization network comprises a ring having an external clock injected at a single point, configuring the synchronization network comprises: performing the clock configuration for the ring in a ring manner by: for a node having external clock injection in the ring, configuring an extracted external clock; and for each node having no external clock injection in the ring, configuring two chains for extracting clocks from adjacent nodes at both sides of the node, and configuring an extracted clock in an extraction direction being the same as a preset extraction direction of an operation clock of the ring, as an operation clock, the extraction direction of the operation clock of the ring being clockwise or counter clockwise.

3 . The configuration method according to claim 2 , wherein:
the ring is a single ring; or the ring is interconnected at least with another ring, and a non-interconnection node in the ring has external clock injection; or the ring is interconnected with at least another ring, other nodes than a node for interconnecting with the ring in the another ring has external clock injection, and interconnection nodes of the ring and the another ring are regarded as nodes having external clock injection in respective rings.

4 . The configuration method according to claim 1 , wherein:
if the synchronization network comprises a ring having external clocks injected at double points, configuring the synchronization network comprises: performing the clock configuration for the ring in a ring manner by: for each node having no external clock injection in the ring, configuring two chains for extracting clocks from adjacent nodes at both sides of the node, and configuring an extracted clock in an extraction direction being the same as a preset extraction direction of an operation clock of the ring, as an operation clock, the extraction direction of the operation clock of the ring being clockwise or counter clockwise; and configuring one of two nodes having external clock injection in the ring as a main operation node, and another of the two nodes as a standby operation node; for the main operation node, configuring an extracted external clock and configuring one chain for extracting a clock from an adjacent node at one side of the main operation node in an extraction direction being opposite to the extraction direction of the operation clock of the ring; and for the standby operation node, configuring an extracted external clock and configuring one chain for extracting a clock from an adjacent node at one side of the standby operation node in an extraction direction being the same as the extraction direction of the operation clock of the ring, and configuring the extracted clock of the chain as the operation clock.

5 . The configuration method according to claim 4 , wherein:
the ring is a single ring; or the ring is interconnected at least with another ring, and two non-interconnection nodes in the ring have external clock injection; or the ring is interconnected with at least another ring, other nodes than an interconnection node in the two rings have external clock injection, and interconnection nodes of the ring and the another ring are regarded as one node having external clock injection in respective rings, the ring is performed with clock configuration; and the one node being regarded as having external clock injection has different operation states in the two rings to which the node belongs; or the ring is interconnected with at least another two rings, each node other than a node interconnected with the ring in the another two rings has external clock injection, all nodes interconnected with each of the another two rings in the ring are regarded as one node having external clock injection in the ring, the ring is performed with clock configuration; and the one node being regarded as having external clock injection has different operation states in the two rings to which the node belongs.

6 . The configuration method according to claim 5 , wherein:
if two interconnection nodes are regarded as one node, the method further comprises: determining the operation states of the two interconnection nodes as standby main rings; configuring two chains of extracted clocks in two directions between the two interconnection nodes, or configuring one chain in an extraction direction being the same as the extraction direction of an operation clock of the main ring, and configuring the extracted clock in an extraction direction being the same as the extraction direction of the operation clock of the main ring as the operation clock.

7 . The configuration method according to claim 1 , wherein
if the synchronization network comprises a ring having an external clock injected at a single point, configuring the synchronization network comprises: performing the clock configuration for the ring in a shortest-path manner by: for a node having external clock injection in the ring, configuring an extracted external clock; and for each node having no external clock injection in the ring, determining a shortest path from the node having no external clock injection to a node having external clock injection, configuring for the node having no external clock injection two chains for extracting clocks from adjacent nodes at both sides of the node having no external clock injection, and configuring an extracted clock of one of the chains located on the shortest path as the operation clock.

8 . The configuration method according to claim 7 , wherein:
the ring is a single ring; or the ring is interconnected at least with another ring, and a non-interconnection node in the ring has external clock injection; or the ring is interconnected with at least another ring at a single point, other nodes than the node for interconnecting with the ring in the another ring has external clock injection, and the interconnection node is a node having external clock injection in the ring.

9 . The configuration method according to claim 1 , wherein:
if the synchronization network comprises a ring having external clocks injected at double points, configuring the synchronization network comprises: performing the clock configuration for the ring in a shortest-path manner, by: for each node having external clock injection in the ring, configuring an extracted external clock and configuring at least one chain for extracting a clock from an adjacent node at one side of the node having external clock injection; and for each node having no external clock injection in the ring, determining a shortest path from the node having external clock injection to a node having external clock injection, configuring for the node having external clock injection two chains for extracting clocks from adjacent nodes at both sides of the node having external clock injection, and configuring an extracted clock of one of the chains located on the shortest path as the operation clock.

10 . The configuration method according to claim 9 , wherein:
for each node having external clock injection in the ring, configuring at least one chain for extracting a clock from an adjacent node at one side of the node having external clock injection comprises: if a common adjacent node exists between two nodes having external clock injection, for each of the two nodes,

Assignees

• Zte Corp

Inventors

• Luo Bin

Classifications

• H04W56/002

  Mutual synchronization · CPC title

• H04J3/0638

  Clock or time synchronisation among nodes; Internode synchronisation (synchronization for ring networks H04L12/422; data switching networks with synchronous transmission H04L12/43) · CPC title

• H04L41/12

  Discovery or management of network topologies · CPC title

• H04J3/0679 Primary

  by determining clock distribution path in a network · CPC title

• H04L12/42

  Loop networks · CPC title