| 摘要 |
The present invention relates to a technique for providing selectively secure time synchronization in an M2M system. More specifically, the present invention relates to a technique wherein an M2M device (D) or an M2M gateway (G), which is an M2M object in an M2M area network, receives policy information for implementing a time synchronization operation from the NSCL of a network domain, and then implements a time synchronization operation with another M2M object, which is connected through the M2M area network, by referring to the received policy information. |
