| 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 10 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 10. The OLT 10 includes: a traffic monitoring part 5 for measuring the amount of traffic of data received from a high-speed ONU (40, 41) that is a slave station unit that makes communications using the high-speed optical signal; and a bandwidth allocating part 4 for allocating a grant to a low-speed ONU (30, 31) on the basis of report information acquired from the low-speed ONU (30, 31) that is a slave station unit that makes communications using the low-speed optical signal, the bandwidth allocating part 4 allocating a grant to the high-speed ONU (40, 41) on the basis of report information acquired from the high-speed ONU (40, 41), 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 5. |
