| 摘要 |
The method for managing an accurate distribution of time in a packet network, the packet network comprising a peer-to-peer transparent clock (P2P TC) hardware support, the peer-to-peer transparent clock (P2P TC) being at least used in order to measure and correct delays of link or path adjacent to network elements and NE residence time, a Master (106) /Slave (108) end-to-end synchronization path (112) comprising a first set of network elements (104 1 , 104 2 , 104 3 ). Each time stamped packet comprises at least a correction field (CF) indicating the cumulated transmission delay of the said packet along the synchronization path, the correction field (CF) being updated by each network element of the first set. The method comprises :
—� detecting a failure event;
—� storing by the first element (104 2 ) a measured past path delay (P_LD) of at least one previously transmitted time stamped packet received by the first element ;
—� calculating a new correction field value being a function of:
o the incoming current value of the received correction field (CF) ;
o the first network element residence time;
o a first value depending of a measured past path delay value (P_LD) ;
—� generating a first indicator when detecting a failure. |
