Patent ID: 8170013
Filing Date: 2012-05-01
Classification: H03L,H04N

Abstract:
1. A device operative to send packets in a packet communication network comprising at least two stations, said device comprising: means for extracting image pips on the basis of a synchronization signal; means for initializing an image counter on the basis of the said image pips; means for initializing a counter in response to zero-crossings of the image counter, the counter being regulated by a clock produced by the image counter; means for sampling the counter every period T means for sending packets containing the samples of the counter in the network; means for receiving packets containing samples sent by a station of the network as echo samples to the samples of the counter sent by the device in the network; means for evaluating a duration of propagation of samples over an outward-return trip between said device and said station in response to the echo samples; means for determining a phase shift value Δφ on the basis of the duration of propagation; and means for sending the phase shift value Δφ in the network.