OAM METHOD IN ETHERNET PASSIVE OPTICAL NETWORK

摘要

PURPOSE: An OAM(Operations Administration and Maintenance) method in an EPON(Ethernet Passive Optical Network) is provided to receive a response frame for an OAM frame transmitted from an ONU(Optical Network Unit), and to decide whether the response frame is an available frame, thereby carrying out a more efficient function. CONSTITUTION: An OLT(Optical Line Terminal) transmits a ping request/loopback frame to ONUs(500). The OLT waits for a ping response/loopback frame from the ONUs(502). The OLT decides whether the ping response/loopback frame is received(504). If so, the OLT decides whether the received ping request/loopback frame arrives within predetermined time(506). When deciding whether the received ping request/loopback frame arrives within the predetermined time, the OLT decides by using a time stamp field.