| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a PON system including an OLT and a plurality of ONUs, with increased data transmission efficiency on the entire PON system. <P>SOLUTION: An ONU includes: a transmission buffer section 2; a buffer supervision section 7 for controlling transmission of a bandwidth allocation request to an OLT based on the amount of accumulated transmission data on the transmission buffer section 2 according to inquiry information about whether the bandwidth allocation request exists or not from the OLT; and a sequence processing section 4 for executing a transmission control sequence to the OLT according to an instruction from the buffer supervision section 7. The OLT includes: a bandwidth allocation control section for inquiring whether the band width allocation request exists or not for the ONU; a bandwidth allocation request reception section for receiving and processing the bandwidth allocation request from the ONU; and a control supervision section for determining whether the inquiry includes the bandwidth allocation request or not, and when the request is included, for transmitting the bandwidth allocation information, and when not included, for determining that the transmission buffer section transmits no data and performing control processing. <P>COPYRIGHT: (C)2012,JPO&INPIT |
