A method and apparatus for
time synchronization (TS) method using GPS information in a communication
system synchronizing the time of slave nodes, which do not have a
GPS receiver, by using GPS information of a node having a
GPS receiver. The method includes the steps of extracting 1PPS, TOD, 1PPS_en, and clocks using
GPS signals by a grand master node having a
GPS receiver, stabilizing the signals, generating a
sync message for TS, and transmitting the
sync message to a slave node; receiving the
sync message by the slave node and conducting a TS operation using OFCC synchronization technology extracting 1PPS, TOD, and 1PPS_en signals using the modified TOD information by the block and delivering to a stabilization block of the slave node for stabilization; and redelivering to the TS block to update TOD information and generate a sync message for TS of a second slave node.