STATION-SIDE OPTICAL LINE TERMINATING DEVICE, PROGRAM, AND METHOD THAT DETERMINE DISCOVERY SLOT SIZE FROM ESTIMATED NUMBER OF REGISTRATION REQUEST UNITS

摘要

PROBLEM TO BE SOLVED: To provide a station-side optical line terminating device (OLT) capable of determining a suitable discovery slot size of a next cycle according to the degree of a conflict of Register_REQ.;SOLUTION: The OLT includes: request successful unit detection means of detecting a request successful unit as an ONU having succeeded in a registration request from Register_REQ received from the ONU in a predetermined time zone; received signal differentiation means of differentiating a received signal including the Register_REQ in the predetermined time zone; registration request unit estimation means of discriminating Register_REQ overlapping owing to a conflict from the differentiated received signal and estimating the number of registration request units as the number of ONUs having made registration requests; and slot size determination means of calculating the number of remaining units as the number of ONUs having failed in registration request from the difference between the estimated number of registration request units and the detected number of request successful units, and determining a size of a discovery slot in a next cycle using the remaining number of units.;COPYRIGHT: (C)2013,JPO&INPIT