PROTOCOL FOR CLOCK DISTRIBUTION AND LOOP RESOLUTION

摘要

In response to a network topology change, a clock root node calculates a new clock path for each affected node by building a clock source topology tree, and identifying from that tree a path to the network node from a clock source of higher or equal stratum relative to that network node. The root node then sends a network message to each node indicating the new path that the node should use. Each node receives the message and compares the new path with the existing path. If the paths are different then the node acquires the new path just received in the message. If the paths are the same then the node does nothing and discards the message.

主权项

1. A network comprising a set of nodes, the set of nodes including a root node, the root node being aware of nodal adjacency and nodal clock quality level for the set of nodes and being configured to set up and maintain a network clock distribution infrastructure for the set of nodes by:
creating an eligibility matrix of elements that do not violate clock sourcing hierarchy constraints; deriving a clock distribution tree topology indicative of clock sourcing for a plurality of nodes from the eligibility matrix; detecting a network topology change; identifying a node affected by the network topology change; calculating, based at least in-part on the clock distribution tree topology, a new clock distribution path for the affected node; and sending an indication of the new clock distribution path to the affected node; and the affected node being configured:
to receive the indication of the new clock distribution path; andto receive clock signal packets from other nodes of the network; andto process clock signal packets based on the new clock distribution path.