Patent ID: 9277256
Filing Date: 2016-03-01
CPC Classification: H04J,H04N

Claim Text:
1. A first node for a synchronous network, the first node comprising: an interface configured to (i) interconnect the first node to a second node over an isochronous transport link and (ii) transmit and receive repetitive frames comprising user data to and from the second node, a first local clock that establishes a first local time of the first node, and a time-locked loop configured to synchronize the first local time of the first local clock to a second local time of the second node established by a second local clock, wherein the time-locked loop is configured to synchronize the first local time to the second local time by phase locking the first local clock to a time difference between the first local clock and the second local clock, wherein the time difference is determined by receiving a first timestamp of the second local clock, providing a first time difference between (i) the first local time at reception of the first timestamp and (ii) the received first timestamp, transmitting a second timestamp of the first local time to the second node, and receiving from the second node a second time difference between (i) the second local time at reception of the second timestamp and (ii) the second timestamp, and wherein time information of the first node and the second node is exchanged between the first and second nodes by way of the repetitive frames.