Patent ID: 8831044

Claim:
A system, comprising: a first network device configured to generate a first clock; a second network device configured to transmit a plurality of frames in response to receiving a request from the first network device to transmit the plurality frames; and a third network device configured to generate a second clock, receive the plurality of frames transmitted by the second network device, generate time stamps based on the second clock to indicate times at which the plurality of frames are received by the third network device, and transmit a first signal including the time stamps, wherein the first network device is configured to receive the plurality of frames transmitted by the second network device, receive the first signal transmitted by the third network device, generate a second signal based on (i) the plurality of frames received from the second network device, and (ii) the first signal received from the third network device, and transmit the second signal, wherein the third network device is configured to synchronize the second clock of the third network device to the first clock of the first network device based on the second signal received from the first network device.