A station side device that performs Discovery processing method and the processing of the unknown subscriber unit

摘要

PROBLEM TO BE SOLVED: To improve the efficiency of the finding processing of an ONU (Optical Network Unit).;SOLUTION: When passing in the inspection of a first cyclic code (CRC8) for which the prescribed range of the preamble of a REGISTER_REQ packet transmitted from the ONU is an inspection range and failing in the inspection of a second cyclic code (CRC32) for which LLID included in the preamble part of the REGISTER_REQ packet is a broadcast LLID and an SA field arranged in a transmission order in the REGISTER_REQ packet and the field of type/Opecode are the inspection range, in the case that it is confirmed that the value of the field of the type/Opecode of the REGISTER_REQ packet is a predetermined value, the SA is held, the SA is turned to DA, and a discovery GATA packet prepared by adding an LLID intrinsic to the ONU is transmitted to the ONU.;COPYRIGHT: (C)2010,JPO&INPIT