Measure and improve clock synchronization using combination of transparent and boundary clocks

A non-transitory computer readable media storing instruction which when executed cause a plurality of slave nodes to perform operations to select a primary master node from a plurality of master nodes, the operations comprising:

• determining an overall offset between each of the slave nodes and each of the master nodes, the determining comprising for each of the slave nodes:
• measuring a first timing delay from the slave node to an adjacent boundary node over a synchronization communication session;
• measuring a second timing delay from the slave node to each of the master nodes over a transparent communication session;
• determining the overall offset as the difference between the first and second timing delays;
• and
• selecting, by the slave nodes and based on results of the measuring, the primary master node from the plurality of master nodes.

A system for a plurality of slave nodes to select a primary master node from a plurality of master nodes, the system comprising:

• a non-transitory computer readable memory storing instructions;
• a processor programmed to cooperate with the instruction in the memory to perform operations comprising:
• determining an overall offset between each of the slave nodes and each of the master nodes, the determining comprising for each of the slave nodes:
• measuring a first timing delay from the slave node to an adjacent boundary node over a synchronization communication session;
• measuring a second timing delay from the slave node to each of the master nodes over a transparent communication session;
• determining the overall offset as the difference between the first and second timing delays;
• and
• selecting, by the slave nodes and based on results of the measuring, the primary master node from the plurality of master nodes.