| 摘要 |
In a PON system including a high-speed optical signal of a high transmission speed and a low-speed optical signal the speed of which is lower than that of the high-speed optical signal, the PON system employing TDMA system for upward signal transmission, an OLT controls transmission and reception of the low-speed optical signal and the high-speed optical signal and allocates a grant to a slave station unit connected to the OLT. The OLT includes: a traffic monitoring part for measuring the amount of traffic of data received from a high-speed ONU that is a slave station unit that makes communications using the high-speed optical signal; and a bandwidth allocating part for allocating a grant to a low-speed ONU on the basis of report information acquired from the low-speed ONU that is a slave station unit that makes communications using the low-speed optical signal, the bandwidth allocating part allocating a grant to the high-speed ONU on the basis of report information acquired from the high-speed ONU, a grant allocated in a previous cycle, and a result of measurement of the amount of traffic in the previous cycle acquired from the traffic monitoring part. |
