Band method of applying station optical line termination device and intra-office optical line terminating equipment .

摘要

PROBLEM TO BE SOLVED: To surely transmit a DyingGasp to an OLT even when power supply to an ONU is abruptly interrupted.;SOLUTION: The present invention is an OLT configuring a network system by being connected to a plurality of ONUs with optical fibers or the like, and a band grant method for the OLT. It is determined whether transmission of DyingGasp is possible or not, on the basis of at least respective parameters of a DBA cycle Tdba [Sec] set by OLT, power retention time Tdg [Sec] of an arbitrary ONU to be registered, a guaranteed minimum band Bmin [bps] of the ONU, a maximum length of conduction frame Fmax [Byte] to be permitted between the OLT and ONU as a system, and best effort ON/OFF parameters of the ONU. Then, a DyingGasp band is granted to a REPORT transmission Grant once in DBA cycle X (X=Tdg÷Tdba, X is an integer that is one or more) times.;COPYRIGHT: (C)2013,JPO&INPIT