TIME SYNCHRONIZATION PATH SELECTION DEVICE AND TIME SYNCHRONIZATION PATH SELECTION METHOD

摘要

[Problem] To optimize a path for time synchronization in a network in which devices of different types of accuracy classes are mixed. [Solution] In a time transmission system, BC nodes 200 having different types of device performances are mixed, and a plurality of PTP packet paths, which are led to a BC node 220 from GM nodes 101 and 102 via the BC nodes 200, exist. Each of the BC nodes 200 positioned in a front stage in each path notifies the BC node 200 positioned in a subsequent stage, which is downstream of the front-stage BC node 200, of performance information indicating the device performance of the front-stage BC node 200. The BC node 220 includes: a determination index calculation unit 11 for calculating a determination index for each path by referring to the performance information notified from each of the BC nodes 200 positioned in the front stage in each path; and a path selection unit 12 for selecting a path for transmitting and receiving PTP packets from among the plurality of PTP packet paths that are led to the BC node 220, on the basis of the determination index for each path which has been calculated.